20. –What’s wrong with her?

　 --Her back ______.

　 A. hurt　　　　　　 B. will hurt　　　 C. was hurting 　　　D. hurts　

19. When winter _______, it gets colder and colder.

　 A. comes　　　　　 B. will come　　 C. came　　　　 D. shall come　

18. Do you know _____ elephant is ______ useful animal?

　 A. the, an　　　　　 B. a, a　　　　 C. a, the　　　　　 D. an, a　　

17. What a kind girl, ____?

　 A. doesn’t the girl　 B. isn’t she　　 C. doesn’t she　　　 D. isn’t the girl　　

16. –Do you know the meaning of “NEGATIVE NUMBER”?

　 --Yes, it’s a word for math. It means _______.

　 A. 化合价　　　　 B.负数　　　　 C. 密度　　　　　 D. 细胞

15. Do you know _____ to say this in English?

　 A. what　　　　　 B. how　　　　 C. when　　　　　 D. which　　

14. –I will go to my hometown for Spring Festival.

　 --Really? _______.　

　A. Enjoy yourself　　 B. Thank you　 C. That’s right　　　 D. See you

13. Is _____ necessary to stand in line for the bus?

　A. that　　　　 B. this　　　　　 C. it　　　　　　　 D. he

12. I will come to see you if I ______ free next week.

　A. am　　　　　 B. have　　　　 C. will be　　　　　 D. will have　

11. At first the students were reading loudly, but when the teacher went out of the classroom, the students ______.　

　A. stop talking　 B. stop to talk　 C. stopped talking　 D. stopped to talk