27.　　 The reason _______ he gave for being late was ________ he overslept this morning．

　　 A. why; that　　　　 　　　　　　　　　　 B. why; because　 　 　　

　　 C. which; that　　 　 　　　　　　　　 D. which; because

26.　　 The dog had such ________ to its master that it would not leave him, even when he

　　 was dead．

　　 A. devotion 　　　　 B. contribution 　　　　 C. connection 　 D. application

25.　　 To make the students understand the problem the teacher tried to explain it, but the

　　 explanation just did not _________to the class．

　　 A. get through　 B. get around　　　　　 C. get down　　 D. get across

24.　　 As we all know, _________ medical examination will help us find out health problems

　　 as early as possible.

　　 A. regular　　 B. general　　　 　　 　　 C. common　　　 D. normal

23.　　 The medicine is on sale everywhere. You can get it at ________ chemist’s.

A. each　　　 　 B. some　　 　　　　　　 C. certain　　 　 D. any

22.　　 - Seems you are quite familiar with Russia.

　　 - That is because I _________ the country in 1999.

　　 A. have visited B. was visiting　　 C. had visited D. visited

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.　　 For a long time they walked without saying ________ word. Jim was the first to break

___________ silence.

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

35. (8分。每空1分。)

(1)样方法 ；　 标志重捕法

(2)显著提高了群落充分利用阳光等环境资源的能力

(3)非生物的物质和能量；　 分解者 ；　 12．5　

　 　(4)间接价值　 ；　　 潜在价值

第Ⅲ卷　 选作题

选一．(15分。每空1分 )

(1)毛霉 ；析出水分，使豆腐块变硬；抑制微生物的生长，避免腐败变质；菌丝

(2)选择；稀释涂布平板法　

(3)TaqDNA聚合酶；变性；复性；延伸　

(4)营养；氧气；PH值；干热灭菌；高压蒸汽灭菌

选三.(15分。每空1分 )

(1)质粒 ；　　 标记　 ；　 　DNA连接酶； 重组DNA　

(2)农杆菌转化法；　　 抗原-抗体

(3)细胞的全能性；　 脱分化；　 再分化；　 筛选　

(4)显微注射技术；　 受精卵； 桑椹胚；　 囊胚；　 原肠胚