31．Mary wrote books to earn money while John gained his wealth _________ selling Mary’s works.

A. on　　　　 B. by　　　　 C. in　　　　 D. through

30．I hated it when people don’t ___________ their promises.

A. carry out　　　 B. look out　　　　 C. run out　　　　 D. find out

29．________ hard he tried, he could not change his wife’s mind.

A. However　　 　B. Whatever　　　　 C. As　　　　 D. No matter what

28．------I don’t know why he has made such a silly mistake in the exam.

　 ------ He ____________ it before he handed in the paper.

A. may have checked　　　　 B. might check

C. must have checked　　　 D. should have checked

26．When she finished her story, none of us said anything about it, which made her feel rather ________.

A. embarrassing　　　 B. embarrassed　　　　 C. embarrass　　　 D. embarrassment

27 Read the passage a second time, ___________ the meaning won’t become clearer to you.

A. and　　　　 B. so　　　　 C. or　　　　 D. but

25．E-mail, as well as phone calls, _____________ an important part in daily communication.

A. are playing　　　 B. is playing　　　 C. have played　　　 D. has played

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。

21 ------ He runs his own company at the age of 21.

　------- ___________________

A. Good luck!　　　　　　 B. That’s quite something　　

C. Congratulations!　　　　　 D. It’s hard to say.

22 ------ How did you find _________ long talk given by the headmaster on ___________ Teachers’ Day?

　 -------- Boring. I’d rather he had made it short.

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

23 ------- How can we __________ to a changeable environment?

-------- By constant study and changing our ideas.

A. adopt　　　 B. adapt　　 　　　C. add　　　　　 D. admit

24．If we don’t take steps, some rare animals, such as the Tibetan antelopes and pandas will ____________ some day just as dinosaur.

A. die out　　 B. die away　　　 C. die down　　　 D. die off

22. (本题满分12分)已知向量，

(1)　　　 求在上的单调增区间；

(2)　　　 若，求 的值

2009-2010下学期长海高中期末考试

21．(本题满分12分)

为了了解高中新生的体能情况，某学校抽取部分高一学生进行一分钟跳绳次数测试，将所得数据整理后，画出频率分布直方图(如图)，图中从　　 左到右各小长方形面积之比为2：4：17：15：9：3，第二小组频数为12﹒

(Ⅰ)第二小组的频率是多少？样本容量是多少？

(Ⅱ)若次数在110以上(含110次)为达标，试估计该学校全体高一学生的达标率是多少？

(Ⅲ)在这次测试中，学生跳绳次数的中位数落在哪个小组内？请说明理由．

20．(本题满分12分)在一个盒子中装有6支圆珠笔，其中3支一等品，2支二等品和1支三等品，从中任取3支﹒求

(Ⅰ)恰有1支一等品的概率；

(Ⅱ)没有三等品的概率﹒