1. The nephew of Pliny the Elder wrote the only eyewitness account of the great eruption of Vesuvius in two letters to the historian Tacitus. (A) The nephew of Pliny the Elder wrote the only eyewitness account of the great eruption of Vesuvius in two letters to the historian Tacitus.
(B) To the historian Tacitus, the nephew of Pliny the Elder wrote two letters, being the only eyewitness accounts of the great eruption of Vesuvius.
(C) The only eyewitness account is in two letters by the nephew of Pliny the Elder writing to the historian Tacitus an account of the great eruption of Vesuvius.
(D) Writing the only eyewitness account, Pliny the Elder's nephew accounted for the great eruption of Vesuvius in two letters to the historian Tacitus.
(E) In two letters to the historian Tacitus, the nephew of Pliny the Elder wrote the only eyewitness account of the great eruption of Vesuvius.
词汇：nephew 侄子 Pliny 普林尼 the nephew of (pliny the elder) 老普林尼的侄子 account of 记录 account for 负责 eruption 火山爆发 Tacitus 塔西陀
eyewitness 目击证人 Vesuvius 维苏威火山
第一步：划线部分是整句，考虑句子结构考察，从句太多分句行。
第二步：观察句子开头和结尾，看到有逗号和没逗号。 排除AC,留下BDE
第三步：C看到being，看到前面有historian 和 nephew， 指代不清，排。
第四步：看到account of 和account for ，选择account of，不改变句子意思。选择E
考点： 修饰 the nephew of pliny the elder， 优于 pliny the elder's nephew；
account of 和account for 意思不同
回过头看，AE,之间的区别，就在于逗号和介词短语提前。 A的in the two letters to the historian 强调的是 Vesuvius，而E是强调动词nephew worte
2.Initiated five centuries after Europeans arrived in the New World on Columbus Day 1992, project SETI pledged a $100 million investment in the search for extraterrestrial intelligence. A )Initiated five centuries after Europeans arrived in the New World on Columbus Day 1992, project SETI pledged a $100 million investment in the search for
extraterrestrial intelligence.
(B)Initiated on Columbus Day 1992, five centuries after Europeans arrived in the New World, a $100 million investment in the search for extraterrestrial intelligence
was pledged by Project SETI.
(C)Initiated on Columbus Day 1992, five centuries after Europeans arrived in the New World, Project SETI pledged a$100 million investment in the search for
extraterrestrial intelligence.
(D)Pledging a $100 million investment in the search for extraterrestrial intelligence, the initiation of Project SETI five centuries after Europeans arrived in the New World on
Columbus Day 1992.
(E)Pledging a $100 million investment in the search for extraterrestrial intelligence five centuries after Europeans arrived in the New World,on Columbus Day 1992,
the initiation of Project SETI took place。
词汇：SETI search for extraterrestrial intelligence的缩写 extraterrestrial 外星人，地球外的
第一步：划线部分是全句，考察句子结构
第二步：观察开头结尾和逗号部分
第三步：看到开头的ing 和 ed，意识到考察主语对象；观察五个选项 留存AC
第四步：AC 看修饰细节，A 中 on columbus day 1992 修饰New world，C中，修饰initiated
第五步：留C
3.In ancient Thailand, much of the local artisans' creative energy was expended for the creation of Buddha images and when they constructed and decorated the temples that enshrined them. (A)much of the local artisans' creative energy was expended for the creation of Buddha images and when they constructed and decorated the temples that
enshrined them
(B)much of the local artisans' creative energy was expended on the creation of Buddha images and on construction and decoration of the temples in which
they were enshrined
(C) much of the local artisans' creative energy was expended on the creation of Buddha images as well as constructing and decoration of the temples in which
they were enshrined
(D) creating images of Buddha accounted for much of the local artisans' creative energy, and also constructing and decorating the temples enshrining them
(E) the creation of Buddha images accounted for much of the local artisans' creative energy as well as construction and decoration of the temples that enshrined them
词汇：artisan 工匠 thailand 泰国 buddha 佛陀 enshrine 珍藏
第一步：划线部分是全句，考察句子结构
第二步：观察开头结尾和逗号部分
第三步：看到只有D有逗号，顿生好感，看下架构发现不对creating images 不能做主语
第四步：看回ABCE,开头是much of the local artisans，主语结构对的，排E
第五步：看到C中有as well as,排C
第六步：看到B中的expended on，同时看到了A中的them 和expended for ，留B
语法点：主语，固定用法，and 和as well as 的区别 them 的指代
4.While all states face similar industrial waste problems, the predominating industries and the regulatory environment of the states obviously determines the types and amounts of waste produced, as well as the cost of disposal.
(A) all states face similar industrial waste problems, the predominating industries and the regulatory environment of the states obviously determines
(B) each state faces a similar industrial waste problem, their predominant industries and regulatory environment obviously determine
(C) all states face a similar industrial waste problem; their predominating industries and regulatory environment obviously determines
(D) each state faces similar industrial waste problems, the predominant industries and the regulatory environment of each state obviously determines
(E) all states face similar industrial waste problems, the predominant industries and the regulatory environment of each state obviously determine
5.A new study suggests that the conversational pace of everyday life may be so brisk it hampers the ability of some children for distinguishing discrete sounds and words and, the result is. to make sense of speech.
(A) it hampers the ability of some children for distinguishing discrete sounds and words and, the result is, to make
(B) that it hampers the ability of some children to distinguish discrete sounds and words and, as a result, to make
(C) that it hampers the ability of some children to distinguish discrete sounds and words and, the result of this, they are unable to make
(D) that it hampers the ability of some children to distinguish discrete sounds and words, and results in not making
(E) as to hamper the ability of some children for distinguishing discrete sounds and words, resulting in being unable to make
词汇：brisk 轻快的 hampers 妨碍，束缚 discrete 分离的
第一步：划线部分是大半句，首先考察句子结构
第二步：观察开头结尾和逗号部分，看到了it 和that，和后面的and ， resulting 意识到考点
第三步：so.....that ,排AE,同时也意识到 so that 副词罩 优先
第四步：看到了and ，看到了to distinguish ， 所以选 to make
第五步：留B
语法点：so....that, 修饰形容词 brisk
6.Many house builders offer rent-to-buy programs that enable a family with insufficient savings for a conventional down payment to be able to move into new housing and to apply part of the rent to a purchase later.
(A) programs that enable a family with insufficient savings for a conventional down payment to be able to move into new housing and to apply
(B) programs that enable a family with insufficient savings for a conventional down payment to move into new housing and to apply
(C) programs; that enables a family with insufficient savings for a conventional down payment to move into new housing, to apply
(D) programs, which enables a family with insufficient savings for a conventional down payment to move into new housing, applying
(E) programs, which enable a family with insufficient savings for a conventional down payment to be able to move into new housing, applying
第一步：划线部分长，考虑结构
第二步：观察句子开头，发现定从和分词，意识到考点
第三步：仔细观察开头，发现programs 应该是enable， 排除CD
第四步：发现AB是并列，E是打捞句
第五步：发现B to move and to apply ，A是被动
第六步：B
7.The first trenches that were cut into a 500-acre site at Tell Hamoukar. Syria, have yielded strong evidence for centrally administered complex societies in northern regions of the Middle East that were arising simultaneously with but independently of the more celebrated city-states of southern Mesopotamia, in what is now southern Iraq.
(A) that were cut into a 500-acre site at Tell Hamoukar, Syria, have yielded strong evidence for centrally administered complex societies in northern regions of the Middle East that were arising simultaneously with but
(B) that were cut into a 500-acre site at Tell Hamoukar, Syria, yields strong evidence that centrally administered complex societies in northern regions of the Middle East were arising simultaneously with but also
(C) having been cut into a 500-acre site at Tell Hamoukar, Syria, have yielded strong evidence that centrally administered complex societies in northern regions of the Middle East were arising simultaneously but
(D) cut into a 500-acre site at Tell Hamoukar, Syria, yields strong evidence of centrally administered complex societies in northern regions of the Middle East arising simultaneously but also
(E) cut into a 500-acre site at Tell Hamoukar, Syria, have yielded strong evidence that centrally administered complex societies in northern regions of the Middle East arose simultaneously with but
8.The only way for growers to salvage frozen citrus is to process them quickly into juice concentrate before they rot when warmer weather returns.
(A) to process them quickly into juice concentrate before they rot when warmer weather returns
(B) if they are quickly processed into juice concentrate before warmer weather returns to rot them
(C) for them to be processed quickly into juice concentrate before the fruit rots when warmer weather returns
(D) if the fruit is quickly processed into juice concentrate before they rot when warmer weather returns
(E) to have it quickly processed into juice concentrate before warmer weather returns and rots the fruit
词汇：salvage 营救 citrus 柑橘
第一步：观察划线部分，在后面，长，考虑结构和细节
第二步：观察选项开头，发现 to do 和 if 和for 意识到考点
第三步：根据句意，选择 to do
第四步：观察AE选项，发现单复数 it them，they 和warmer weather ，选E
语法点：在句型判断时，遇到to do 千万要小心，因为它有固定用法也是 in order to do 的缩写，要注意逻辑意思
9.Fossils of the arm of a sloth found in Puerto Rico in 1991 and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles Islands.
(A) sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
(B) sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on
(C) sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of
(D) sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on
(E) sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of
词汇：Fossils 化石 sloth 树濑 puerto 港口 mammal 哺乳动物
第一步：观察划线部分，在后面，长，考虑结构和细节
第二步：观察开头，发现 考察定从，观察修饰对象是 fossils 排除ABCE
第三步：选择D,看句意和结构，主语+定从+VO+ making， 可行 D
10.Heating-oil prices are expected to be higher this year than last because refiners are paving about S5 a barrel more for crude oil than thev were last year.
(A) Heating-oil prices are expected to be higher this year than last because refiners are paying about $5 a barrel more for crude oil than they were
(B) Heating-oil prices are expected to rise higher this year over last because refiners pay about $5 a barrel for crude oil more than they did
(C) Expectations are for heating-oil prices to be higher this year than last year's because refiners are paying about $5 a barrel for crude oil more than they did
(D) It is the expectation that heating-oil prices will be higher for this year over last because refiners are paying about $5 a barrel more for crude oil now than what they were
(E) It is expected that heating-oil prices will rise higher this year than last year's because refiners pay about $5 a barrel for crude oil more than they did
11.The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as "standing waves."
(A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are
(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are
(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is
(D) stationary crests and troughs although the air that forms them is moving rapidly, are
(E) stationary crests and troughs although they are formed by rapidly moving air, is
12.The stars, some of them at tremendous speeds, are in motion just as the planets are, yet being so far away from Earth that their apparent positions in the sky do not change enough for their movement to be observed during a single human lifetime.
(A) The stars, some of them at tremendous speeds, are in motion just as the planets are, yet being
(B) Like the planets, the stars are in motion, some of them at tremendous speeds, but they are
(C) Although like the planets the stars are in motion, some of them at tremendous speeds, yet
(D) As the planets, the stars are in motion, some of them at tremendous speeds, but they are
(E) The stars are in motion like the planets, some of which at tremendous speeds are in motion but
13.Heavy commitment bv an executive to a course of action, especially if it has worked well in the past, makes it likely to miss signs of incipient trouble or misinterpret them when thev do appear.
(A) Heavy commitment by an executive to a course of action, especially if it has worked well in the past, makes it likely to miss signs of incipient trouble or misinterpret them when they do appear.
(B) An executive who is heavily committed to a course of action, especially one that worked well in the past, makes missing signs of incipient trouble or misinterpreting ones likely when they do appear.
(C) An executive who is heavily committed to a course of action is likely to miss or misinterpret signs of incipient trouble when they do appear, especially if it has worked well in the past.
(D) Executives' being heavily committed to a course of action, especially if it has worked well in the past, makes them likely to miss signs of incipient trouble or misinterpreting them when they do appear.
(E) Being heavily committed to a course of action, especially one that has worked well in the past, is likely to make an executive miss signs of incipient trouble or misinterpret them when they do appear.
词汇：incipient 初期的，misinterpret 误解，commitment
第一步：划线部分是全部，想也不用想就知道是句子结构
第二步：观察开头，逗号和结尾；发现结构无比混乱，指代不清；
第三步：发现了especially 在中间的ABDE, 它究竟修饰前还是后？ 排
第四步：剩下C
第五步：不放心，继续观察C的结构，主语是A executive is likely to miss or misinterpret signs of incipient trouble when they do appear，especially if it....
第六步：发现it they 的指代被限定，很清晰C
14.Yellow jackets number among the 900 or so species of the world's social wasps, wasps living in a highly cooperative and organized society where thev consist almost entirely of females—the queen and her sterile female workers.
(A) wasps living in a highly cooperative and organized society where they consist almost entirely of
(B) wasps that live in a highly cooperative and organized society consisting almost entirely of
(C) which means they live in a highly cooperative and organized society, almost all
(D) which means that their society is highly cooperative, organized, and it is almost entirely
(E) living in a society that is highly cooperative, organized, and it consists of almost all
15.El Nino, the periodic abnormal warming of the sea surface off Peru, a phenomenon in which changes in the ocean and atmosphere combine allowing the warm water that has accumulated in the western Pacific to flow back to the east.
(A) a phenomenon in which changes in the ocean and atmosphere combine allowing the warm water that has accumulated
(B) a phenomenon where changes in the ocean and atmosphere are combining to allow the warm water that is accumulating
(C) a phenomenon in which ocean and atmosphere changes combine and which allows the warm water that is accumulated
(D) is a phenomenon in which changes in the ocean and atmosphere combine to allow the warm water that has accumulated
(E) is a phenomenon where ocean and atmosphere changes are combining and allow the warm water accumulating
15.Beatrix Potter, in her book illustrations, carefully coordinating them with her narratives, capitalized on her keen observation and love of the natural world.
(A) Beatrix Potter, in her book illustrations, carefully coordinating them with her narratives,
(B) In her book illustrations, carefully coordinating them with her narratives, Beatrix Potter
(C) In her book illustrations, which she carefully coordinated with her narratives, Beatrix Potter
(D) Carefully coordinated with her narratives, Beatrix Potter, in her book illustrations
(E) Beatrix Potter, in her book illustrations, carefully coordinated them with her narratives and
16.Originally developed for detecting air pollutants, a technique called proton-induced X-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it, is finding uses in medicine, archaeology, and criminology.
(A) Originally developed for detecting air pollutants, a technique called proton-induced X-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(B) Originally developed for detecting air pollutants, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called proton-induced X-ray emission
(C) A technique originally developed for detecting air pollutants, called proton-induced X-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(D) A technique originally developed for detecting air pollutants, called proton-induced X-ray emission, which has the ability to analyze the chemical elements in almost any substance quickly and without destroying it,
(E) A technique that was originally developed for detecting air pollutants and has the ability to analyze the chemical elements in almost any substance quickly and without destroying the substance, called proton-induced X-ray emission,
17.Authoritative parents are more likely than permissive parents to have children who as adolescents are self-confident, high in self-esteem, and responsibly independent.
(A) Authoritative parents are more likely than permissive parents to have children who as adolescents are self-confident, high in self- esteem, and responsibly independent.
(B) Authoritative parents who are more likely than permissive parents to have adolescent children that are self-confident, high in self-esteem, and responsibly independent.
(C) Children of authoritative parents, rather than permissive parents, are the more likely to be self-confident, have a high self-esteem, and to be responsibly independent as adolescents.
(D) Children whose parents are authoritative rather than being permissive, are more likely to have self-confidence, a high self-esteem, and be responsibly independent when they are an adolescent.
(E) Rather than permissive parents, the children of authoritative parents are the more likely to have self-confidence, a high self-esteem, and to be responsibly independent as an adolescent.
第一步：划线部分长，结构
第二步：观察选项开头和逗号，意识到考察句子主语和比较结构
第三步：主语是parents 还是 chilren ，比较A 和D,主语是 parents
第四步：选A, 比较结构清晰，省略准确，并列平行清晰
第五步：其他选项看一眼，B who are 累赘 B
18.Published in Harlem, the owner and editor of The Messenger were two young journalists, Chandler Owen and A. Philip Randolph, who would later make his reputation as a labor leader.
(A) Published in Harlem, the owner and editor of The Messenger were two young journalists, Chandler Owen and A. Philip Randolph, who would later make his reputation as a labor leader.
(B) Published in Harlem, two young journalists, Chandler Owen and A. Philip Randolph, who would later make his reputation as a labor leader, were the owner and editor of The Messenger.
(C) Published in Harlem, The Messenger was owned and edited by two young journalists, A. Philip Randolph, who would later make his reputation as a labor leader, and Chandler Owen.
(D) The Messenger was owned and edited by two young journalists, Chandler Owen and A. Philip Randolph, who would later make his reputation as a labor leader, and published in Harlem.
(E) The owner and editor being two young journalists, Chandler Owen and A. Philip Randolph, who would later make his reputation as a labor leader, The Messenger was published in Harlem.
第一步：全句，结构
第二步：看5个选项开头，意识到找主语结构。Publised 对应 the messagers。make reputation 对应chandler Owen and Philip
第三步：排除AB留CDE
第四步：看到who，意识到指代不清，是指代Owen还是Philip？还是二者，选C
19.Construction of the Roman Colosseum, which was officially known as the Flavian Amphitheater, began in A.D. 69. during the reign of Vespasian, was completed a decade later, during the reign of Titus, who opened the Colosseum with a one-hundred-day cycle of religious pageants, gladiatorial games, and spectacles.
(A) which was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian,
(B) officially known as the Flavian Amphitheater, begun in A.D. 69, during the reign of Vespasian, and
(C) which was officially known as the Flavian Amphitheater, began in A.D. 69, during the reign of Vespasian, and
(D) officially known as the Flavian Amphitheater and begun in A.D. 69, during the reign of Vespasian it
(E) officially known as the Flavian Amphitheater, which was begun in A.D. 69, during the reign of Vespasian, and
20.Gall's hypothesis of there being different mental functions localized in different parts of the brain is widely accepted today.
(A) of there being different mental functions localized in different parts of the brain is widely accepted today
(B) of different mental functions that are localized in different parts of the brain is widely accepted today
(C) that different mental functions are localized in different parts of the brain is widely accepted today
(D) which is that there are different mental functions localized in different parts of the brain is widely accepted today
(E) which is widely accepted today is that there are different mental functions localized in different parts of the brain
21.The World Wildlife Fund has declared that global warming, a phenomenon most scientists agree to be caused bv human beings in burning fossil fuels, will create havoc among migratory birds by altering the environment in ways harmful to their habitats.
(A) a phenomenon most scientists agree to be caused by human beings in burning fossil fuels,
(B) a phenomenon most scientists agree that is caused by fossil fuels burned by human beings,
(C) a phenomenon that most scientists agree is caused by human beings' burning of fossil fuels,
(D) which most scientists agree on as a phenomenon caused by human beings who burn fossil fuels,
(E) which most scientists agree to be a phenomenon caused by fossil fuels burned by human beings,
第一步：划线部分长，结构+细节
第二步：看选项，形容词罩或者名词罩，前主语，后谓语，中间只能是形容词罩,留DE
第三步: DEb比较，E更清除，agree to do 固定用法
22.Whereas in mammals the tinv tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes form a random pattern.
(A) Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes
(B) Whereas the tiny tubes for the conveying of nutrients to bone cells are arrayed in mammals in parallel lines, birds have tubes that
(C) Unlike mammals, where the tiny tubes for conveying nutrients to bone cells are arrayed in parallel lines, birds' tubes
(D) Unlike mammals, in whom the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, the tubes in birds
(E) Unlike the tiny tubes that convey nutrients to bone cells, which in mammals are arrayed in parallel lines, in birds the tubes
第一步：划线部分长，结构+细节
第二步：混乱，找主语
第三步: A 无主语， B birds C D mammals 不能和tube 比较 E Tubes 比较
第四步：AE比较，并列罩，优先
23 According to its proponents, a proposed new style of aircraft could, by skimming along the top of the atmosphere, fly between most points on Earth in under two hours A)According to its proponents, a proposed new style of aircraft could, by skimming along the top of the atmosphere, fly between most points on Earth in under two hours.
B)By skimming along the top of the atmosphere, proponents of a proposed new style of aircraft say it could fly between most points on Earth in under two hours.
C).A proposed new style of aircraft could fly between most points on Earth in under two hours, according to its proponents, with it skimming along the top of the atmosphere.
D). A proposed new style of aircraft, say its proponents, could fly between most points on Earth in under two hours because of its skimming along the top of the atmosphere.
E).According to its proponents, skimming along the top of the atmosphere makes it possible that a proposed new style of aircraft could fly between most points on Earth in under two hours
词汇：proponents 拥护者
第一步：全句，结构
第二步：找到主语 a proposed new style of aircraft ,排BE
第三步：ACD, 观察主句结构，skimming along the top of the atmosphere ,不改变句意思 ，排D because of 表示直接因果。
第四步：C中看，后面跟了两个修饰成分，排
第五步：留A
语法点： between most points ， 少见，留意。
24.The Anasazi settlements at Chaco Canyon were built on a spectacular scale ，with more than 75 carefully engineered structures, of up to 600 rooms each, were connected by a complex regional system of roads.
A. with more than 75 carefully engineered structures, of up to 600 rooms each, were
B. with more than 75 carefully engineered structures, of up to 600 rooms each,
C. of more than 75 carefully engineered structures of up to 600 rooms, each that had been
D. of more than 75 carefully engineered structures of up to 600 rooms and with each
E. of more than 75 carefully engineered structures of up to 600 rooms each had been
词汇：spectacular 壮观的 complex复杂的
第一步：划线部分长，且三个逗号，意识到结构
第二步：观察5个选项，发现of up to 600 rooms each 修饰的部分是 structures，意识到each 后必须有逗号，排 CDE
第三步：AB 观察 ，不同在于were， 有were变成 were built were connected，没有并列结构，不选
第四步：B
25.The gyrfalcon, an Arctic bird of prey, has survived a close brush with extinction; its numbers are now five times greater than when the use of DDT was sharply restricted in the early 1970’s.
A. extinction; its numbers are now five times greater than
B. extinction; its numbers are now five times more than
C. extinction, their numbers now fivefold what they were
D. extinction, now with fivefold the numbers they had
E. extinction, now with numbers five times greater than
This is GMATPREP question. Pls help narrow down to the correct answer. Also what are the errors in the wrong choices?
词汇：gyrfalcon 矛隼（产于北极和近北极地区) brush 冲突 arctic 北极
第一步：划线部分出现分号，意识到结构
第二步：AB优选，并列
第三步：an arctic bird of prey ，单复数选its
第四步：greater than or more than ，尊重原句，选择A
26.Analysts blamed May's sluggish retail sales on unexciting merchandise as well as the weather, colder and wetter than was usual in some regions, which slowed sales of barbecue grills and lawn furniture.
A. colder and wetter than was usual in some regions, which slowed
B. which was colder and wetter than usual in some regions, slowing
C. since it was colder and wetter than usually in some regions, which slowed
D. being colder and wetter than usually in some regions, slowing
E. having been colder and wetter than was usual in some regions and slowed
词汇：sluggish 迟缓的 merchandise 商品
第一步：划线部分在中间，有逗号，考虑结构和细节
第二步：看5个选项，意识到考察结构
第三步：看前面主谓宾全，后面肯定是定语从句
第四步：which修饰N,紧跟名词，选B ,后的slowing 修饰主句结构。
most points on Earth in under two hours