题目内容

5

A) Yes, please.
B)OK.
C)Mind your steps.
D)Tomorrow morning.

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6

A) No, thanks.
B)Not at all.
C)Sorry , wrong number.
D)It’s fine.

7

A) Don’t mention it.
B)Hurry up.
C)Certainly.
D)See you later.

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简述什么是偏移归位。