18.Since you understand all this,　　　 is no need for me to explain.

A. it　　 B. this　 C. that　　 D. there

17.　　　 any trouble in finding his house, don’t hesitate to let me know at once.

A. Have you　　　 B. Should you have　　　

C. You should have　 D. If you had had

16. It was at six sharp in the morning 　　　she came out of the house.

A. when　 B. until　 C. since　 D. that

15.People had to run away from their homes as the fighting progressed to avoid　　　　 .

A. being killed　　 B. to kill　 C. killing　 D. to be killed

14.There is no light on. They 　　　be at home.

A. mustn’t　 B. can’t　 C. needn’t　 D. shouldn’t

13. There is a sign by the road, which　　　 　“Parking 　　　”.

A. reads; forbidding　　　 B. reads; forbidden

C. writes; forbidding　　 D. writes; forbidden

12.Somehow, in the rush to get out of the building, I got 　　　from my mother.　

A. separated　 B. separating　 C. to separate　 D. separate

11.She demanded that Jim　　 　the books he borrowed from her.

　 A. would return　　 B. returned　　 C. return　 D. must return

10.The question seemed easy 　　　　, but when the students tried to answered it, they discovered how difficult it was.

　 A. in sight　　　　 B. at first sight　

C. first of all　　　 D. in the first place

9.---Would you mind helping me to feed some porridge to my cat?

　---　　 .

　 A. No, of course not　　 B. Never mind　

　 C. No, please do　　　　 D. Never mind