35. Many people claim that they have seen UFO with their own eyes, _____ I personally doubt.

A. that　　　 　　　　　 B. which　　　 　　　　　　　　　　　　　　　　　　 C. when　　 　　　　 D. where[]

34. -You _____ a meal this evening. I had dinner at a restaurant with Tom.

　　 -Well, why didn’t you phone me and let me know?

A. should not cook　　 　　　　　　　　 B. don’t need to cook　

C. needn’t have cooked　 　　　　　 D. should have cooked

33. Water, which seems so simple and common, is _____ makes life possible.

A. that　　　　 　　 B. what　　　　　 　 C. which　　　　 　 D. how