题目内容

It's you who helped me out when I was in trouble.

A. 对
B. 错

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They emphasize the importance of careful driving.

A. 对
B. 错

The little girls had a really rough time when her father died.

A. 对
B. 错

The conference _a full week by the time itends.

A. will have lasted
B. last
C. had lasted
D. would last

If I_harder at school,I would be sitting in a confortable office now.

A. had worked
B. worked
C. were to work
D. were working

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