问题

It’s time that you_____with the relief work in the flood-stricken area after the awful typhoon.

A:must help
B:can help
C:helped
D:have helped

正确答案是：

同类题型

34. Hi, Susan, are you interested in buying some used books for school? You _____ really save some money that way.

Is this hospital __________ you visited yesterday

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___ the help of computers , there are no ___ problems