.I think I can fix your car tomorrow afternoon. you will have to wait till next Friday. A

问题补充：

.

I think I can fix your car tomorrow afternoon., you will have to wait till next Friday.

A. If so

B. If not

C. If necessary

D. If possible

答案：

A. If so

(答案→)B. If not

C. If necessary

D. If possible

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