35. From time to time a crocodile has snatched someone _______ he or she is even aware that the crocodile is there.

A. when 　　　　　　　　　　　　　　 B. until　　　　　　　　　 C. since　　　　　　　　　　　 D. before

34. _____ unemployment and crime are high, it can be assumed that the latter is due to the former.

A. Before　　　　　　　　　　　 B. Where 　　　　　　　　　 C. Unless　　　　　　　 D. Until

33. _____the Internet is of great help, I don’t think it ‘s a good idea to spend too much time on it.

A. If　　　　　　　　　　　　　　 B. While 　　　　　　　　　　 C. Because 　　 　　　　　 D. As

32. It was a matter of________ would take the position.

A. who　　　 B. whoever　　　 C. whom　　　 D. whomever

31. In China, all the students work hard at school _________ going to university for higher education in the future.

　 A. in the habit of　　　　　 B. in the hope of

　 C. in search of　　　　　　 D. in honor of

30. Robert is said ___________ abroad, but I don’t know what country he　 studied in.

A . to have studied　　　　　 B. to be studying

C. to study　　　　　 　　　D. to have been studying