用方框中所给单词的适当形式填空，使对话通顺,正确，每词仅用—次(每空—词)。

A: Have you ever been to America?

B: Yes.

A: Well, I will go to an American friend's home to celebrate Christmas tomorrow, Could you please tell me what I am to do?

B: OK, with pleasure.

A: Should I arrive on time or five to ten minutes late?

B: Both are OK. But don't get there .

A: I'm that traffic might be terrible.

B: Well, if you're more than fifteen minutes late, it right be a good idea to call the host and tell him or her you're going to be late.

A: OK. Should I any flowers?

B: Certainly. Flowers are always welcome.

A: What should I do at dinner?

B: Watch the other and do what they do. You'll be OK.

A: I see. Thanks a lot.

B: You're welcome.