Your classroom is very clean.Sure. It after school every day.A. is cleanedB. clea

问题补充：

--- Your classroom is very clean.

--- Sure. It after school every day.

A. is cleaned

B. cleans

C. cleaned

D. is cleaning

答案：

(答案→)A. is cleaned

B. cleans

C. cleaned

D. is cleaning

解析：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。