1. times (twice) +the + n.
2. x times adj. (比较形式) than(manhattan说这种表达不够clear)
6.double, triple,quadruple, quintuple,
这样的题目, 首先要弄清楚比较的双方是否合理, 如果合理的话, 再看twice作为副词的位置: 可以用在as..as或比较级之前, 也可以放在比较点的名词之前, 担要保证twice前后的词要能直接搭配(副词的作用).
72. The number of undergraduate degrees inengineering awarded by colleges and universities in the United States increasedby more than twice from 1978 to 1985.
(A) increased by morethan twice
(B) increased more thantwo times
(C) more than doubled
(D) was more thandoubled
(E) had more thandoubled
twice只有一种词性:副词 因为by后面要接名词或代词, 所以这里twice不行. 答案C
17. In the 1980’s therate of increase of the minority population of the United States wasnearly twice as fast as the 1970’s.
(A) twice as fast as
(B) twiceas fast as it was in
(C) twice what it was in
(D) two times faster than that of
(E) two times greater than
A中是twice as fast as the 1970’s 在这里是rate和1970's比较，是不对的
B 意思是A的人口增长率是B的（人口增长率）的两倍一样快, rate 不能够fast, increase 才能够fast
C选项的意思是：A的人口增长率是B的两倍
举个例子he is twice as strong as he was。注意比较对象He has twice the strength he had
Asurvey by the National Council of Churches showed that in 1986 there were 20,736 female ministers, almost 9 percent of thenation's clergy, twice as much as 1977.
A)twiceas much as 1977
B)twiceas many as 1977
C)doublewhat it was in 1977
D)double the figure for 1977
E)anumber double that of 1977's
According to surveys by the National Instituteon Drug Abuse, about 20 percent of young adult used cocaine in 1970, doublingthose reported in the 1977 survey.
A. doubling those reported in 1977survey
B. to double the number the 1977survey reported
C. twice those the 1977 surveyreported
D. twice as much as those reportedin the 1977 survey
E. twice the number reported in the 1977 survey
In 1914 a total of 469,000 cars and trucks wereproduced in the United States, but in 1929 almost twice the numbers oftucks alone came off the assembly lines.
A. the numbers of tucks alone
B. that number oftrucks alone
C. thenumber of trucks by themselves
D. as many trucks themselves
E. as many trucks by themselves
Providing initial evidence that airport are a largersource of pollution than they were once believed to be, environmentalists in Chicago reportthat the total amount of pollutant emitted annually by vehicles at O’HareInternational Airport is twice as much as that which is being emittedannually by all motor vehicles in the Chicago metropolitanarea.
A. as much as thatwhich is being emitted annually by all
B. as much annually as is emitted by the
C. as muchcompared to what is annually emittedby all
D. that emitted annually by all
E. that emitted annually compared to the
A new hair-growing drug is being sold for three times the price, per milligram, as thedrug’s maker charges for another product with the same active ingredient.
A. As
B. than
C. that
D. o fwhat
E. at which
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