题目内容
How dirty the windows are! They really require ______.
- A.to clean
- B.being cleaned
- C.to have cleaned
- D.cleaning
D
考查动词用法。require doing =" require" to be done需要(被)做,根据句意选择D。
考查动词用法。require doing =" require" to be done需要(被)做,根据句意选择D。
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How dirty the floor is! You should have someone _____ it at least twice a day.
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How dirty the windows are! They really require _______.
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