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

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

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

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

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

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    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

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    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

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