Question

(安徽省馬鞍山市2009屆高三第一次教學質量檢測) It was reported that as many as 50％ of patients do not take medicine

       directed，     has drawn doctors’attention．

   A. when；it        B.as;what             C.as;which       D.that;and

Answer 1

C

解析:

考察狀語從句和定語從句，as引導方式狀語從句，補全應該為as they are directed。Which引導非限制性定語從句指代前面整個句子且做主語。