题目
Careful surveys have indicated that as many as 50 percent of patients do not take drugs _______ directed.A. likeB. soC. whichD. as
Careful surveys have indicated that as many as 50 percent of patients do not take drugs _______ directed.
A. like
B. so
C. which
D. as
题目解答
答案
D. as
解析
步骤 1：理解句子结构
句子的主干是“Careful surveys have indicated that as many as 50 percent of patients do not take drugs _______ directed.”，其中“as many as 50 percent of patients”是主语，“do not take drugs”是谓语，“directed”是过去分词作后置定语修饰“drugs”。
步骤 2：分析选项
A. like：像，不符合语法结构。
B. so：如此，不符合语法结构。
C. which：关系代词，引导定语从句，但此处没有先行词。
D. as：像，符合语法结构，引导方式状语从句。
步骤 3：选择正确答案
根据句子结构和语法，正确答案是D，表示“像被指示的那样”。
句子的主干是“Careful surveys have indicated that as many as 50 percent of patients do not take drugs _______ directed.”，其中“as many as 50 percent of patients”是主语，“do not take drugs”是谓语，“directed”是过去分词作后置定语修饰“drugs”。
步骤 2：分析选项
A. like：像，不符合语法结构。
B. so：如此，不符合语法结构。
C. which：关系代词，引导定语从句，但此处没有先行词。
D. as：像，符合语法结构，引导方式状语从句。
步骤 3：选择正确答案
根据句子结构和语法，正确答案是D，表示“像被指示的那样”。