Our classroom every day so it’s very clean.A. cleansB. is cleaningC. is cleanedD. cleane

问题补充：

Our classroom every day, so it’s very clean.

A. cleans

B. is cleaning

C. is cleaned

D. cleaned

答案：

A. cleans

B. is cleaning

(答案→)C. is cleaned

D. cleaned

解析：根据句意该句应用被动语态，故选C。