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26. -You can’t imagine ____ fantastic fun web chatting is.

-Really? But it may cause a lot of trouble sometimes.

A. what   B. how   why     D. so

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25. -What did the doctor say?

- He said, “   on time, this medicine will be quite effective”.

A. Taking    B. Take    Taken   D. Being taken

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24. There is no excuse,    , for hurting her feelings.

A. but   B. yet     although    D. though

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23. ­-You look so young. Haven’t you graduated from your university?

-Yes, I     in the English Department of Shandong University for four years.

A. studied    B. study     had studied    D. was studying

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22. -Is that a book on painting? If so, I want to borrow    .

-Yes, it is.

A. this   B. it     one    D. the one

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第一节:语法和词汇知识(共15小题;每小题1分,满分15分)

21. -What about      shirt she bought for her father?

-It’s wonderful as     birthday preset.

A. a; a    B. the; a    the; 不填   D. a; 不填

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22.(本小题满分12分)已知函数

(Ⅰ)当时,判断函数在定义域上的单调性;

(Ⅱ)若函数的图象有两个不同的交点,求的取值范围;

(Ⅲ)设点是函数图象上的两点,平行于  的切线以为切点,求证:

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21.(本小题满分12分)

如图,椭圆长轴端点为,为椭圆中心,为椭圆的右焦点,且.

(1)求椭圆的标准方程;

(2)记椭圆的上顶点为,直线交椭圆于点问:

是否存在直线,使点恰为的垂心?若存在,求出直线的方程;若不存在,请说明理由.

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