题目内容：

补全对话。选择方框内的句子完成对话（其中有两项是多余的）。（5分）

A: Excuse me. Would you mind helping me?

B:      1.      What’s up?

A: One of my American friends invited me to her house on Christmas Day ,but I don’t know much       about the customs and manners.       2.

B: Sure.When are you supposed to get there?

A:      3.

B:Well, the first thing is that you should get there on time.

A:All right.       4.

B: You are supposed to say “Merry Christmas” .

A: OK.      5.