根据对话内容从方框内所给的选项中选出最佳答案，使对话完整，符合逻辑，句义通顺。注意：有多余选项。
A: You must be really excited about leaving for America tomorrow, Li Ping!
B: Yeah. 81______
A: Nervous about what?
B: I don’t know many of the customs and manners in the USA. 82______
A: Sure.
B: 83______
A: Well, it’s important to be on time when you’re invited for dinner. 84______ Americans expect their guests to be on time.
B: Then how long may I stay there?
A: 85______ Or you seem to have come only for the meal. When your friends seem to be getting tired and running out of things, it’s time to leave. The next day, call or write a thank-you note to say how much you enjoyed the evening.
A. It’s good to stay at home for you.
B. After the meal, don’t leave at once.
C. Could you give me a hand?
D. What rules do they have in America?
E. But I’m a bit nervous.
F. You’re supposed to leave before the meal.
G. It’s impolite to arrive late.
(2010年 甘肃 兰州)
参考答案：
81.E 根据下文的Nervous about what?可以看出李平有些紧张。故选E。
82.C 根据“我对许多美国的风俗和习惯都不懂”和下面的回答‘Sure.’可知此处是在寻求帮助。注意习惯用语‘give a hand’，意思是“帮一下忙”。故选C。
83.D 根据下文it’s important to be on time when you’re invited for dinner.可知上文问的是风俗礼仪。故选D。
84.G 根据下文Americans expect their guests to be on time.可知迟到是不礼貌的。故选G。
85.B 根据问句‘Then how long may I stay there?’和下文’‘you seem to have come only for the meal’以及‘When …,it’s time to leave.’可以确定，此处是告诫用餐后不能立刻就走人。故选B。