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。
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