79．When the teacher answers your question, you don't hear clearly, you should say“ ____ ”

　A．Say it again.

　B．I didn't hear clearly.

　C．I beg your pardon?

　D．Repeat it again.

78．“May I have a word with you?”“ ____ ”

　A．Sorry, you may.

　B．No, you may.

　C．What's that?

　D．Sorry, I'm too busy now.

77．“Will you please show us around the exhibition?”“ ____ ”

　A．Right.

　B．That's right.

　C．That's all right.

　D．All right.

76．“Must the homework be handed in tomorrow?”“ ____ ”

　A．Yes, you must.

　B．Yes, you may.

　C．No, you needn't.

　D．No, it needn't.

75．“Can you answer this question?”“Well, ____ ”

　A．I'd like to.

　B．how easy it is.

　C．let me try.

　D．quite good.

74．“Shall I close the window?”“ ____ ”

　A．Not at all.

　B．never.

　C．No, please don't.

　D．Don't do that now.

73．“Can I carry this box for you?”“ ____ ”

　A．Yes, you must.

　B．That's very kind of you.

　C．Let me help you.

　D．I can carry it.

72．“May I borrow your ruler?”“Sure. ____ ”

　A．Give you.

　B．You are here.

　C．Here you are.

　D．Thank you.

71．“ ____ madam?” “ I'm looking for a dress for my sister.”

　A．What can I do for you.

　B．What do you want to buy.

　C．What about the dress.

　D．Can you help me.

70．“Would you like some milk in your tea? ” “Yes, just ____ .”

　A．little

　B．a little

　C．few

　D．a few