20.Is this book ___ you bought the other day ?

　　　 A.that　　 B. the one　 C.what　　 D.which

19. The days in summer are longer than ___ in winter.

A.these　　 B.those　　 C.that　　 D.this

18. ---These trousers are nice. ____

---They’re RMB 30.

A. How much are they?　　 B. They are very cheap.

C. I’m going shopping?　　 D. How much is it?

17.(　　 ) ---If you have any trouble，be sure to call me.

　　 ---__________.

　　　 A. I am glad to hear that　　　 B. I will. Thank you very much

　　　 C. I have no trouble　　　　 D. I will think it over

16. ---What's your sister like?

　 --- _________.

　　 A. She is a worker　　　　 B. She likes pears

　 　C. She is very thin　　　　 D. She is like her father

15.(　　 ) -Hello，come in. _______.

　 --Thank you.

　　 A. All right　　　　　　　 B. Make yourself at home

　　 C. That's your home　　　　 D. It's a great pleasure

14. White ___ something good.

　A. is often used to express　　　　　 B.often used to express

　C.is often used to expressing　　　　 D. often used to expressing

13.(　 ) The number of customers _____ rising now.

A. is　　　 B. are　　　 C. were　　　 D. be

12.(　 ) Many young people prefer _____.

A. camp　　 B. camped　　 C. to camp　　 D. being camped

11. The possible way _____ a teacher is different from ours.

A. address　　 B. addressing　　 C. to address　 D. addressed