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A: Are you busy this afternoon,Bill?
B: (1)____________________.
A: Let's go to the zoo then.
B: Good idea. (2)_____________________?
A: Dolphins are my favorite. They are very clever. They often help us in the water.
B: (3)____________________?
A: I like pandas.
B: Me too. They are really very cute. But do you know where they are from?
A: (4)____________________. I think.
B: Yes, (5)____________________. Oh , it's time for class. Let's go into the classroom.
A: OK. Let's.

(1)_____________________
(2)_____________________
(3)_____________________
(4)_____________________
(5)_____________________

A: Good morning. Can I help you?
B: Yes, please. I bought this radio the day before yesterday, 1_____ there's something wrong with it.
    Last night it couldn't 2_____. I can' t use it.
A: Let me see. It seems as if it hasn't been used in the right way. Has it been left in the sun 3_____ rain?
B: Of course 4_____. I can't be so foolish.
A: Maybe I have to send it 5_____ to the factory and get it repaired.
B: You may send it back to the factory, but I would like my 6_____ back.
A: I'm 7_____ I can't do that.
B: How long do I have to wait 8_____ I can get it back?
A: At least a month, I think.
B: That's too long. I'm learning English over the radio, you know. Why don't you do something about it?
    I'd like to 9_____ this radio or have my money back.
A: AIl right. You can change it for 10_____ one. Would you like to look at these ones?

(     )1.

A. Yes, they are.
B. No, it isn't.
C. That's OK.

(     )2.

A. No, I don't.
B. Thank you.
C. Not at all.

(     )3.

A. He's tired.
B. She has a toothache.
C. I can't sleep.

(     )4.

A. Don't say so.
B. Never mind.
C. I'm glad you like it.

(     )5.

A. Twice a day.
B. Very much.
C. Small and short.

(     )6. 

A. Sure! Here, take this one.
B.OK. Thank them very much.
C. Great! Let's go.

(     )7.

A. I'll stay there for two days.
B. I am a teacher.
C. Because my parents work there

(     )8.

A. Harbin, I think.
B. How about Guilin?
C. It sounds great.

(     )9. 

A. It looks beautiful.
B. Yes, you can.
C. Sorry, I couldn't.

(     )10.

A. He works in a bank.
B. He moved to London
C. He is going to work in Hainan.