9.Either you or I _____going to the teachers' office after class.
A. am B. is C. are D. will
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
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
6.- Do you have Mary's address?
- Sorry, I don't have it ______ me at present.
A.to B.on C.for D.from
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。
4. pillow A. allow B. shower C. own D. drown
3. answer A. plan B. sandwich C. branch D. rapid
2. exist A. exact B. except C. excellent D. explode
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
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:.