13.(　　 ) _______ the math problem is difficult, I’ll try very hard to work it out.

　　 A. Though　 B. When　 C. Before　 D. After

12.(　　 ) He walked _____ fast for us _____ catch up with.

　　 A. so; that　 B. such; that　 C. enough; to　 D. too; to

11.(　　 ) I want to know _____.

　　 A. what is his name　 B. what’s his name

　 　C. that his name is　　 D. what his name is

10.(　　 ) _____ children shouldn’t be allowed to drive because they are not serious enough at that age.

　　 A. Sixteen years old　 B. Sixteen year olds　

C. Sixteen-years-old　 D. Sixteen-year-old

9.(　　 ) I have ____ the Great Wall twice. It is an _____ place.

　　 A. been to; excited　 B. gone to; exciting　

C. been to; exciting　 D. gone to; excited

8.(　　 ) ----Could you tell me ______?　　 ---- Sorry, I don’t know.

　　 A. when does the train arrive　 B. when the train arrives

　　 C. when arrives the train　 D. the train when arrives

7.(　　 ) Sixty percent of all Chinese are farmers and they are _____ than people who live in the cities.

　　 A. much poor　 B. much poorer　 C. very poor　 D. more poorer

6.(　　 ) ----They have a lot of rules at their house.　 ----________.

　　 A. So do I　 B. So we do　 C. So have　 D. So I have

5.(　　 ) You used to be short, _____?

　　 A. weren’t you　 B. didn’t you　 C. don’t you　 D. used you

4.(　　 ) Practice makes perfect. It is _____ of becoming a successful learner.

　　 A. one of the secret　 B. one of the secrets　 C. one of secret　 D. on secrets