1.It was________great shock to the world that two aero-planes crashed into ______World Trade Center in New York o September 11th, 2001.
A. a; / the C. the; the the
选B。shock指代具体事情时为可数名词，a great shock意为一次沉重的打击；由普通名词构成的建筑类专有名词需加冠词，故答案为B。
2. The TV programme has______on the children as______as the old.
A. a good effect; good
B. a positive effect; well
C. a good affect; well
D. affect; well
选B。have an effect on对有影响；as well as 和一样。
3. ______, I think, and all the problems could be settled.
A. If you make more efforts
B. Making more efforts
C. A bit more effort
D. To have made more efforts
选C。句中有并列连词and，故应选择C项。其中名词短语相当于一个祈使句，完整的句子为：Make more efforts, I think, and all the problems could be settled.如选A , and要删去。
4 ______at in this way, the present situation about birds flue doesnt seem so disappointing.
A. Looking B. Looked
C. Having looked D. To look
选B。根据分词短语作状语，其逻辑主语须与主句的主语保持一致的原则，因主语the present situation与look at 之间为被动关系，故答案为B。
5. you I owe a thousand apologieshaving doubted your ability.
A. For; to B. To; for
C. For; for D. To; to
选B。本句的结构是：owe sb. sth. for doing sth. 或owe sth. to do. for doing sth.。
6. He the person referred to be put in prison.
A. said B. demanded
C. agreed D. thought
选B。referred to为过去分词作后置定；be put in prison前省去了should，在宾语从句中作谓语，在四个选项中，只有demand后跟虚拟语气，结构为：(should) + 动词原形。
7. It is not enough only the rules of grammar if you want to learn English well.
A. keeping in the mind
B. to keep in mind
C. to keep in your mind
D. keeping in your mind
选B。keep sth. in mind 为固定短语，意为记住，记在心里。only to keep sth. In mind为动词不定式作主语。
8. He to the meeting. Have you informed him of it?
Sorry. I to.
A. hasnt come; am going
B. didnt come; have forgotten
C. hasnt come; forgot
D. doesnt come; will have
选C。第一句话Have you informed him of it?
暗示了时间状语so far；而第二句话暗含时间状语then，指当时发生的动作。
9. Many people have been ill from a strange disease these days, weve never heard of before.
A. one B. that C. it D. this
选A。one作同位语，指代前面的disease。
10. She stepped into the bedroom quietly she might wake up her roommates.
A. for fear that B. so long as
C. on condition that D. in order that
选A。so long as 只要；on condition that只要；in order that为了；for fear that唯恐，以防。