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Careful surveys have indicated that as many as 50 percent of patients do not ...

admin2020-12-24  69
问题 Careful surveys have indicated that as many as 50 percent of patients do not takedrugs__________directed.
选项 A.like

B.so

C.which

D.as
答案D
解析考查as引导方式状语从句。在as引导的方式状语从句中，尤其含有be时，常常会省略一部分，而保留其主要成分，如分词或形容词。句中“take drugs asdirected”为“takedrugs as they are directed”的省略形式。句意为“详细调查表明．多达百分之五十的病人没有按照医嘱服药”。
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