问题
选择题
—What a nice classroom!
—It _____ every day.
A．is cleaning
B．has cleaned
C．must clean
D．is cleaned
答案
答案：D
题目分析：句意：多整洁的教室啊！它每天都被打扫。It指代classroom,教室，与谓语动词是被动关系，所以用被动语态:be+过去分词；故选D。
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