问题
选择题
---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
题目分析：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。