问题

The window must have taken you quite a lot of time that day— RightThey____ for weeks

A:haven’t been cleaned
B:hadn’t been cleaned
C:didn’t clean
D:haven’t cleaned

正确答案是：

同类题型

When a pencil is partly in a glass of water, it looks as if it _______

The Browns sent lots of invitations for their party. But because of the improper time, few people ________ it.

The river is too wide for the swimmers________.

Will $200________ ? —I’m afraid not . We need at least 50 more dollars .

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