31. He always brings me a pretty gift ____ he comes to visit me.

A. by the time　　　　 B. sometimes　　　　 C. each time　　　　 D. at times

30. On arriving at home, he found what he had ______________.

A. been stolen　　　 B. stolen　　　　 C. be stolen　　　　　 D. has been stolen

29. --I’m so surprised that her husband died yesterday, but why?

--He died of an illness _____ by smoking too much.

　　 A. caused　　　　　 B. causing　　　　 C. to be caused　　　 　D. being caused

28._______this book and tell me what you think of it.

A. look through　　　 B. look on　　　　 C. look into　　　　　 D. look up

27.　　 --I saw your son fighting with another boy this morning.

--________！It couldn’t be Tom. He has gone to America with his father.

A. Not so　　　　　　 B. suppose not　　　 C. You must be mistaken　　　 D. Probably not

26.　　 We are looking forward as much to China’s successful lunar mission as we are to _______ to the moon in the near future.

A. have flown　　　 　B. flying　　　　　 C. fly　　　　　　　 D. be flown

25.　　 England is the largest of the four countries and ________ it is divided roughly into three zones, that is, South of England, the Midland, and the North.

A. at convenience　　 B. in convenience　 C. for convenience　 D. with convenience

24.　　 ________my sister helping me, I can learn English very quickly.

A. As　　　　　　 B. With　　　　　 C. Because　　　　　 D. Unless

23.　　 John Jason’s quick thinking and ________ first aid skills he learned at school saved Ann Slade’s life, which shows that ________ knowledge of first aid really matters in any emergency situations.

A. /; a　　　　　　　 B. a; the　　　　 C. the; a　　　　　 D. /; /

22. The results of the scientific experiments are valuable to us and they will _______ the success of our research.

A. contribute to　　　 B. stick to　　　　 C. expose to　　　　 D. guide to