问题

Perhaps the day will come ____ people willbe able to breathe clean air in cities

A:Having done;relaxed
B:having done ;relaxing
C:having beendone ; relaxing
D:Done; relaxed

正确答案是：

同类题型

Have you ever been in a situation _____ youknow the other person is right yet you cannot agree with him

____________ —I’d like to buy a present for my father.

I wish you hadn’t given him my telephone number, butyou.

We look forward to the film Kung Fu Panda 2.

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