26. I’ll never trust such a man ______ you described.　

A. that　　　　 B. what　　　 C. whoever　　　 D. as

25. ------- What do you think of Harry, our new roommate?

　 　------- I am not sure, but he is always asking ______ questions.

A. a great many of 　B. a great many　 C. a great number　 D. a large amount of

24. I’m told that you are going to Canada to have a three-month further study. Don’t let such a good chance to improve your English _____ through your fingers.

A. ski　 B. spread 　C. slip　　 D. skip

23. Many students listened to the lecture, but I wondered how much they ______.　

A. took out　　　　 B. took up　　　　 C. took off　　　　　 D. took in

22. The police looked into the case carefully and found the thief had entered the house ______ a ladder.

A. by the means 　　B. by all means　　 C. by ways of　 D. by means of

21. It is _____that he has been addicted to the drugs and has difficulty quitting it.

A. obviously　　　 B. apparently　　　 C. possibly　　　　 D. likely 　

第二节 ：共5小题(满分5分)

听下面一段对话，请根据题目要求，从听到的内容中获取必要的信息，填入16-20的空格中。录音读两遍，每遍之间停顿45秒钟。听完后你有两分钟的作答时间。

45．(10分)已知果蝇中，灰身与黑身为一对相对性状(显性基因用B表示，隐性基因用b表示)；直毛与分叉毛为一对相对性状(显性基因用F表示，隐性基因用f表示)。两只亲代果蝇杂交得到以下子代类型和比例：

请回答：

(1)控制灰身与黑身的基因位于__________；控制直毛与分叉毛的基因位于_________。

(2)亲代果蝇的表现型为♀：_______；♂：_________。

(3)亲代果蝇的基因型为_________、_________。

(4)子代表现型为灰身直毛的雌蝇中，纯合子与杂合体的比例为_________。

(5)子代雄蝇中，灰身分叉毛的基因型为_______、_________；黑身直毛的基因型为

44．(10分)下图是患甲病(显性基因为A，隐性基因

为a)和乙病(为伴性遗传病，显性基因为B，隐

性基因为b)两种遗传病的系谱图，据图回答：

(1)由遗传图解可判断出甲病为常染色体上______性遗传病，其致病基因不可能在X染色体的理由是______________________________________________________。

　 (2)Ⅰ₂的基因型为______________。Ⅲ₂的基因型为______________。

　 (3)假设Ⅲ₁和Ⅲ₅结婚生了一个男孩，则该男孩患一种病的概率为________，所以我国婚姻法禁止近亲间的婚配。