题目内容

The accident was your fault. If ________ more carefully, it wouldn't have happened.

A. you drive
B. you will drive
C. you have driven
D. you had driven

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It's getting late. I don't think Sarah will come to see us now. I would be surprised if ________ to see us now.

A. she came
B. she come
C. she comes
D. she will come

I'm sorry I disturbed you. I didn't know you were busy. If I had known you were busy, I _________ you.

A. wouldn't disturb
B. wouldn't have disturbed
C. would haven't disturbed
D. would have disturbed

Lisa is tired all the time. She shouldn't go to bed so late. If she didn't go to bed so late, she _______ tired all the time.

A. will not be
B. wouldn't be
C. is not
D. would be

价格形成的基础是什么?如何理解?

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