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