请教 OG 31题真心搞不懂。。。

yippewanner · 发表于 2013-2-22 17:42:58

Unlike the conviction held by many of her colleagues that genes were relatively simple and static, Barbara McClintock adhered to her own more complicated ideas about howgenes might operate, and in 1983, at the age of 81, was awarded a Nobel Prize for her discovery that the genes in corn are capable of moving from one chromosomal site to another.
(A) Unlike the conviction held by many of her colleagues that genes were
(B) Although manyof her colleagues were of the conviction of genes being
(C) Contrary to many of her colleagues being convinced that genes were
(D) Eventhough many of her colleagues were convinced that genes were
(E) Even with many of her colleagues convinced of genes being
选项C和D区别在哪儿呢？除了语气上的区别，我觉得两句都对啊~

yippewanner · 发表于 2013-2-22 17:53:40

还有40题：
40. The Organization of Petroleum Exporting Countries (OPEC) had long been expected to announce a reduction in output to bolster sagging oil prices, but officials of the organization just recently announced that the group will pare daily production by 1.5 million barrels by the beginning of next year, but only if non-OPEC nations, including Norway. Mexico, and Russia. were to trim output by a total of 500,000 barrels a day.
(A) year, but only if non-OPEC nations, including Norway, Mexico, and Russia, were to trim
output
(B) year, but onlyifthe output of non-OPEC nations, which includes Norway, Mexico, and Russia, is
trimmed
(C) year only if the output of non-OPEC nations, including Norway, Mexico, and Russia, would be
trimmed
(D) year only if non-OPEC nations, which includes Norway, Mexico, and Russia, were trimming
output
(E) year only if non-OPEC nations, including Norway, Mexico, and Russia, trim output

A选项错在哪儿呢？only if 不是用虚拟语气么？

Lynsey玲 · 发表于 2013-2-23 00:33:31

31题
个人理解，C错在being上了，being有表动作一直或正在进行的意思，显然在这里不对，从句意来看，collegues是过去认为genes were simple,当Barbara已经验证了自己的看法时，collegues的观点也就不会再存在了。

Lynsey玲 · 发表于 2013-2-23 00:43:59

40题
A的错误：
1.两个but连用，使句意不清楚，到底哪个表示转折呢
2.在GMAT中，条件从句一般用现在时和过去时两种，而没有用过去将来时were to的

If…Then constructions
(1) General Rule with no uncertainty
eg: IF Sophie EATS pizza, THEN she BECOMES ill.
IF Present, THEN Present.
=WHENEVER Sophie EATS pizza, she BECOMES ill
(2) General Rule with some uncertainty
eg: IF Sophie EATS pizza, THEN she MAY BECOME ill.
IF Present, THEN Can or May.
(3) Particular Case (in the future) with no uncertainty
eg: IF Sophie EATS pizza tomorrow, THEN she WILL BECOME ill.
IF Present, THEN Future.
=If Sophie HAS EATEN pizza, then she WILL BECOME ill.
(4) Unlikely Case (in the future)
eg: IF Sophie ATE pizza tomorrow, THEN she WOULD BECOME ill.
IF Hypothetical Subjunctive, THEN Conditional (would/could).
Conditional表示对不可能或不真实条件的假设
(5) Case that Never Happened (in the past)
eg: IF Sophie HAD EATEN pizza yesterday, THEN she WOULD HAVE BECOME ill.
IF Past Perfect, THEN Conditional Perfect.

yippewanner · 发表于 2013-2-23 00:48:15

being要是表示正在进行的意思，那可以说的通~但如果仅是表示一种被convince的状态呢？

yippewanner · 发表于 2013-2-23 00:53:27

40题
A的错误：
1.两个but连用，使句意不清楚，到底哪个表示转折呢
2.在GMAT中，条件从句一般用现在时和过去时两种，而没有用过去将来时were to的

If…Then constructions
(1) General Rule with no uncertainty
eg: IF Sophie EATS pizza, THEN she BECOMES ill.
IF Present, THEN Present.
=WHENEVER Sophie EATS pizza, she BECOMES ill
(2) General Rule with some uncertainty
eg: IF Sophie EATS pizza, THEN she MAY BECOME ill.
IF Present, THEN Can or May.
(3) Particular Case (in the future) with no uncertainty
eg: IF Sophie EATS pizza tomorrow, THEN she WILL BECOME ill.
IF Present, THEN Future.
=If Sophie HAS EATEN pizza, then she WILL BECOME ill.
(4) Unlikely Case (in the future)
eg: IF Sophie ATE pizza tomorrow, THEN she WOULD BECOME ill.
IF Hypothetical Subjunctive, THEN Conditional (would/could).
Conditional表示对不可能或不真实条件的假设
(5) Case that Never Happened (in the past)
eg: IF Sophie HAD EATEN pizza yesterday, THEN she WOULD HAVE BECOME ill.
IF Past Perfect, THEN Conditional Perfect.

-- by 会员 Lynsey玲 (2013/2/23 0:43:59)

40题明白了，非常感谢！

Lynsey玲 · 发表于 2013-2-23 11:43:00

being要是表示正在进行的意思，那可以说的通~但如果仅是表示一种被convince的状态呢？

-- by 会员 yippewanner (2013/2/23 0:48:15)

首先convinced不是"被convince"，convinced是convince的adj,意思是确信的，这里be convinced that..确信...
如果表示确信这个状态，也应该是过去的状态，就是were convinced that...又因为contrary to后面只能接名词或短语，所以C可以写成Contrary to many of her collegues convinced that........
（

个人理解哈~~）

yippewanner · 发表于 2013-2-23 16:10:36

恩恩谢谢姐姐！思路很清晰啊~还有一题请教一下~

8. The widely accepted big bang theory holds that the universe began in an explosive instant ten

to twenty billion years ago and has been expanding ever since.

(A) that the universe began in an explosive instant ten to twenty billion years ago and has been expanding

(B) that the universe had begun in an explosive instant ten to twenty billion years ago and had

been expanding

(C) that the beginning of the universe was an explosive instant ten to twenty billion years ago that has expanded

(D) the beginning of the universe to have been an explosive instant ten to twenty billion years ago that is expanding

(E) the universe to have begun in an explosive instant ten to twenty billion years ago and has been expanding

选项A中and前后不需要时态平行么？

Lynsey玲 · 发表于 2013-2-23 18:22:48

恩恩谢谢姐姐！思路很清晰啊~还有一题请教一下~

8. The widely accepted big bang theory holds that the universe began in an explosive instant ten

to twenty billion years ago and has been expanding ever since.

(A) that the universe began in an explosive instant ten to twenty billion years ago and has been expanding

(B) that the universe had begun in an explosive instant ten to twenty billion years ago and had

been expanding

(C) that the beginning of the universe was an explosive instant ten to twenty billion years ago that has expanded

(D) the beginning of the universe to have been an explosive instant ten to twenty billion years ago that is expanding

(E) the universe to have begun in an explosive instant ten to twenty billion years ago and has been expanding

选项A中and前后不需要时态平行么？

-- by 会员 yippewanner (2013/2/23 16:10:36)

我觉得时态主要是由meaning决定的，平行在形式上主要是要求结构一致，至于时态要根据meaning决定，用time marker判断。比如这题中各自有明显的time marker: ten to twenty billion years ago（表示过去时）和ever since(现在完成时)。

yippewanner · 发表于 2013-2-23 19:17:50

恩恩谢谢姐姐！思路很清晰啊~还有一题请教一下~

8. The widely accepted big bang theory holds that the universe began in an explosive instant ten

to twenty billion years ago and has been expanding ever since.

(A) that the universe began in an explosive instant ten to twenty billion years ago and has been expanding

(B) that the universe had begun in an explosive instant ten to twenty billion years ago and had

been expanding

(C) that the beginning of the universe was an explosive instant ten to twenty billion years ago that has expanded

(D) the beginning of the universe to have been an explosive instant ten to twenty billion years ago that is expanding

(E) the universe to have begun in an explosive instant ten to twenty billion years ago and has been expanding

选项A中and前后不需要时态平行么？

-- by 会员 yippewanner (2013/2/23 16:10:36)

我觉得时态主要是由meaning决定的，平行在形式上主要是要求结构一致，至于时态要根据meaning决定，用time marker判断。比如这题中各自有明显的time marker: ten to twenty billion years ago（表示过去时）和ever since(现在完成时)。

-- by 会员 Lynsey玲 (2013/2/23 18:22:48)

恩恩！明白了~真是我的大救星，又有一道不懂的了。。。
34. Lacking information about energy use, people tend to overestimate the amount of energy used by equipment, such as lights, that are visible and must be turned on and off and underestimate that used by unobtrusive
equipment, such as water heaters.
(A) equipment, such as lights, that are visible and must be turned on and off and underestimate that
(B) equipment, such as lights, that are visible andmust be turned on and off and underestimate it when
(C) equipment, such as lights, that is visible and must be turned on and off and underestimate it when
(D) visible equipment, such as lights, that must be turned on and off and underestimate that
(E) visible equipment, such as lights, that must be turned on and off and underestimate it when

请教 OG 31题真心搞不懂。。。

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请教 OG 31题真心搞不懂。。。