---Look! What a nice and clean toilet!---Yes. It every morning.A. is cleanedB. has been c

问题补充：

---Look! What a nice and clean toilet!

---Yes. It every morning.

A. is cleaned

B. has been cleaned

C. is being cleaned

D. was cleaned

答案：

(答案→)A. is cleaned

B. has been cleaned

C. is being cleaned

D. was cleaned

解析：句意：看多么干净的厕所。是的，它每天上午都被清理。动作的承受者作主语，用被动语态。其结构是，主语+be+done.主动语态有的时态被动语态 也有，时态体现在be的变化上。every morning，表示经常性，故用一般现在时。故选A。