Question

【题目】The classroom ______ every day.

A. should clean B. should be cleaned

C. should cleaned D. should be cleaning

Answer 1

【答案】B

【解析】

句意：教室每天都要被打扫。根据句意可知，这里表示教室“被”打扫，故用被动语态，被动语态结构是be+过去分词；另外should是情态动词，所以后跟动词原形，故选B。