35. -------John and I will celebrate our fortieth wedding anniversary next month.

--------Oh, _________!

A. cheer up　　　　 B. well done　　　　 C. go ahead　　　　 D. congratulations

34. _____ I admit that there are problems, I don't' think that they cannot be solved.

A. Unless　　 B. Until　　 C. As　　　 D. While

33. As your instructor(教师) advised, you ought to spend your time on something ____ researching into.

A. precious　　 B. worth　　 C. worthy　　　 D. valuable

32. _____ the fact that his initial(开始的)experiments had failed, Pro. White persisted (坚持) in his research.

A. Because of　　　 B. As to　　　 C. In spite of　　 D. In views of