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25. I must go home now, _______ I have many exercises to _______.

A. for; do              B. since; to be done     C. since; doing           D. for; to be done    26.What you are saying is not ____ to the question under discussion.Please think twice before you 

make any suggestions.                                   

A.strange on   C.familiar  D.relevant                     27._____ troubles me most right now is____ I can’t remember where I have put my car keys.    

A.That ;what   B.What;that   C.What;what   D.That;that

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23. ---It is high time that we _______ to school.

---If only the alarm clock _______!

    A. should go; rung                        B. shall go; had rung   

C. shall go; rung                        D. should go; had rung           24.With so many evidence against him he had to____ his errors openly.                           

A.refuse  B.acknowlege  C.declare   D.recognize       

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22. John and Mary’s room _______ on fire. Many _______ help them put out the fire.

A. are; passer-bys         B. is; passers-by       C. is; passer-bys       D. are; passers-by

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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,并在答题卡上将该项涂黑。

21.---It is reported that there is____ big breakthrough in the cancer treatment.                  ---If only my son could be brought back to ____ life!                   A.a; /      B./; a     C.the;the      D.a;the                      

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30.将一个细胞中的磷脂成分全部提取出来,将其在空气-水界面上铺成单分子层,结果测得单分子层的表面积相当于原来细胞膜表面积的两倍。下列细胞实验与此结果最相符的是  (   )

   A.人的肝细胞                B.蛙的红细胞 

   C.洋葱鳞片叶表皮细胞             D.大肠杆菌细胞

2009-2010学年度第二学期莲塘一中期末终结性测试卷

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29.比较某哺W#W$W%.K**S*&5^U乳动物的胰腺细胞、神经细胞、浆细胞,三者(   )

A.细胞核中DNA含量差别较大      B.细胞中mRNA、蛋白质种类相同

C.细胞中细胞器的种类差别较大     D.都具有分泌功能

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28.在生物体的下列生理活动过程中,没有ADP生成的是(   )

A.胰岛细胞分泌胰岛素         B.胃蛋白酶对蛋白质的分解

C.叶绿体内C5的生成        D.番茄根细胞对Mg2+的吸收

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27.玉米根尖分生区细胞会不停地分裂生长。此时这些细胞      (  )

A.两组中心粒会分别移向两极     B.有K+穿过原生质层进入大液泡

C.染色体数目不断减少        D.保持着全能性

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