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
解析:
略
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How dirty the floor is! You should have someone _____ it at least twice a day.
| A.mop | B.to mop | C.mopping | D.mopped |
How dirty the windows are! They really require _______.
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A.to clean |
B.being cleaned |
C.to have cleaned |
D.cleaning |