35. They love their daughter so much that they are always ready to do everything they can ____ her happiness.

　 　 A. make sure of　　　　　　　　 　　　　　　　　　　 B. be sure of 　　　　　　　　　　

C. to be sure of 　　　　　　　　　　　　　　　　　 D. to make sure of

34. The bus stopped ______ and the passengers were thrown forward.

　 　 A. all of a sudden　　　　　　 　　　　　　　　　　　　　　 B. sudden　　　　　　　　　

C. all of suddenly　　　　　　　　　　　　　　　　　 　　　 D. all of the sudden

33. Many kids ________ the net bar, and _____had a bad effect on their studies.

A. are addicted to; it　　　　　　　　　　　 　　　 B. get engaged in; which

C. are related to; what　　　　　　　　　　　　　 　　　 D. are addicted to; which