单选题
2分
Careful surveys have indicated that as many as 50 percent of patients do not takedrugs__________dire...
Careful surveys have indicated that as many as 50 percent of patients do not takedrugs__________directed.
参考答案: D
参考解析: 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”。