单项选择题

I______ housework when there was a knock at the door.

[A] did
B. was doing
C. am doing

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单项选择题

—Do you know about Jim —He ______ to Canada.

[A] has gone [B] goes [C] had gone

单项选择题

Did the man watch the match

A. No, he didn’t.
B. Yes, he did.

C. He missed the first part.

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