问题
选择题
It was reported that as many as 50% of patients do not take medicine ______ directed, ______ has drawn doctor’s attention.
A．when; it
B．as; what
C．as; which
D．that; and
答案
答案：C
考查定语从句。第一个用as，表“正如”之意；而根据句子，第二个空格不需要再加一个代词的，因此用which引导非限定性定语从句，选C。