According to surveys by the National Institute on Drug Abuse, about 20 percent ofyoung adults used cocaine in 1979, doubling those reported in the 1977 survey.
(A) doubling those reported in the 1977 survey
(B) to double the number the 1977 survey reported
(C) twice those the 1977 survey reported
(D) twice as much as those reported in the 1977 survey
(E) twice the number reported in the 1977 survey
D：those指代错误；as much as在这里修饰可数名词，错误作者: liuyinghong 时间: 2011-3-17 06:44
谢啦~但a those指代错误。。？不是指代adults used cocaine 么作者: mudiduanger 时间: 2011-3-17 20:44
应该是 number和number的对比~~
以下是manhattan里提到的those等这类词的用法：
The Demonstrative Pronouns are this, that, these, and those. You may use any of these pronouns
as adjectives in front of nouns, as we have already seen.
for example：New "nano-papers" incorporate fibers that give THESE MATERIALS strength.
You may also use that or those to indicate a "New Copy" or copies of the antecedent.
for example：The money spent by her parents is less than that spent by her children.
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