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
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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 _______.
A.to clean |
B.being cleaned |
C.to have cleaned |
D.cleaning |