单选题Doctor have said that&nbs

问题补充：

单选题Doctorhavesaidthatasmanyas50%ofpatientsdon’ttakemedicine_______.A.like directedB.to be directedC.as directedD.so that directed

答案：

C解析考查状语从句的省略。填 as directed ，as后省略了they are ,句意：医生说，多大百分之五十的病人不按照指导的那样吃药。