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问题

We __________ used computers many years ago, but now they’re everywhere.

A:can;can
B:can;could
C:could;could
D:could;can;
正确答案是:
同类题型

Who are you going tohavethis letter for you—— My secretary

When Becky ____ after school, she saw her parents inthe living-room.

24The reason ______ he is absent from class is _______ he has caught a bad cold

I think it’s impossible for us to work out the plan in just two days. It’s too difficult.—-You’re right. We can’t be _______ careful and hard while working on it.

What do you usually do weekends

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