2. 外语
  3. According to surveys by the National Institute on Long Abuse, about 20 percent of young adults used cocaine in 1979, doubling th

According to surveys by the National Institute on Long Abuse, about 20 percent of young adults used cocaine in 1979, doubling th

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问题 According to surveys by the National Institute on Long Abuse, about 20 percent of young adults used cocaine in 1979, doubling those reported in the 1977 survey.
选项 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
答案E
解析 A、C、D中的those是错的，those只能指代young adults，而句意不是“使人翻倍”，而是“人的数量”翻倍，B中的动词不定式不知在此作何成分，E中twice the number符合数量倍数增减的第三种表达。
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