Question

--- Your classroom is very clean.
--- Sure. It ________ after school every day.

1. A.
   is cleaned
2. B.
   cleans
3. C.
   cleaned
4. D.
   is cleaning

Answer 1

A
试题分析：句意：你们的教室很干净。——当然了，我们每天放学后打扫它。结合语境可知下文主语it是动作对象，故用被动语态。选A。
考点：被动语态
点评：此类题型主要是确定句子主语与谓语动词的关系。如果是主动关系则用主动语态，反之如果是动宾关系，则用被动语态。