Ⅰ．根据对话内容，选择正确答案．
A．Could you give me a hand？
B．But I’m a bit nervous．
C．What rules do they have in America？
D．It’s impolite to arrive late．
E．After the meal，don’t leave at once． |
A：You must be really excited about leaving for America tomorrow，Li？
B：Yeah．（66）
A：Why？
B：I don’t know many of the customs and manners in the US．（67）
A：Sure．
B：（68）
A：Well，it’s important to be on time when you’re invited for dinner．（69）
B：Then how longmay I stay there？
A：（70）
Or you 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．