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9.Either you or I _____going to the teachers' office after class.

   A. am     B. is      C. are      D. will

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8. -Hi, David, I heard you had an accident this morning.

    -Yes.Luckily, I hit the brakes in time ______ I would have been injured badly.

    A.and      B.but       C.or       D.so

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7.It is well-known to us all that knowledge is __ treasure, but practice is ___ key to it.

  A. a, ∕   B. a, the    C .the, the   D. ∕ , the

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6.- Do you have Mary's address?   

- Sorry, I don't have it ______ me at present.

    A.to       B.on       C.for       D.from

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5. stomach     A. chain   B. chemistry      C. search       D. bench

第二节 语法和词汇知识(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。

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4. pillow      A. allow   B. shower    C. own     D. drown

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3. answer    A. plan   B. sandwich     C. branch    D. rapid

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2. exist      A. exact   B. except      C. excellent   D. explode

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第一节  语音知识(共5小题,每小题1分,满分5分)

从A、B、C、D中找出其划线部分与所给单词的划线部分读音相同的选项。

1. cushion      A. club   B. drug     C. future    D. push

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22.(本小题满分12分)

已知,数列满足,数列满足

(1)求证:数列为等比数列;

(2)令,求证:

(3)求证:.

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