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    23. Mary was studying in her room ______ she heard a woman screaming.

    　　 A. as　　　　 B. when　　　　 C. while　　　　 D. until　

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    22. John Janson’s ______ first aid skills saved Ann Slade’s life, which shows ______ knowledge of first aid really matters.

    A. /; /　　　 B. a; the　　　　 C. the; a　　　　　 D. /; a

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    第一节：单项填空(共15小题；每小题1分，满分15分)

    从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

    例：It is generally considered unwise to give a child _______he or she wants.
    A. however　　　 B. whatever　　　　 C. whichever　　　 D. whenever
    答案是B。

    21.-I’m afraid I’ve lost your e-mail address.

    -Well, ______, I can easily write you another one.

    A. never mind　 B. that’s right　　 C. you’re careless　 D. don’t say sorry

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