11. _____ their real economic situations, they got some relief fund from the government.
A. Considering B. Considered
C. Having been considered D. Being considered
12. Tina _____ have known the truth, or she would have told us.
A. mustn't B. shouldn't C. can't D. needn't
13. There are some police cars in front. What do you suppose _____?
A. is the matter B. is happened
C. is the wrong D. the trouble is
14. _____ of water makes Death Valley a desert, but it is by no means devoid.
A. Lacking B. Being lack
C. Because of lack D. Lack
15. In recent years much more emphasis has been put______ developing the students productive skills.
A. onto B. in C. over D. on
16. A survey was carried out on the death rate of those who were infected by SARS, ________were surprising.
A. as results B. which results
C. the results of it D. the results of which
17. The organization broke no rules, but ______had it acted responsibly.
A. neither B. so C. either D. both
18. Many workers were organized to clear away remained of the World Trade Center.
A. those B. that C. what D. where
19. My train arrive in New York at eight o'clock tonight. The plane I would like to take from there ______by then.
A. would leave B. will have left C. has left D. had left
20. The professor could hardly find sufficient grounds _____his arguments in favor of the new theory.
A. to be based on B. to base on
C. which to base on D. on which to base
11. A considering "考虑到"，而 considered "被认为"，根据全句含义，句中主语they和considering是主动关系，因此选择项。
12. C
13. A
14. D lack 作名词，后加of短语。如用A项,lacking是及物动词的动名词，后面不用介词of或作不及物动词,后面加介词in…。
15. D put/ place/ lay emphasis on 是固定搭配，表示"强调，注重。"
16. D the results of which 等于whose results，是非限制性定语从句。
17. A
18. C 该题空格处缺少的是连词，且在从句中作主语，所以排除A,D; that在名词性从句中只起连接作用。
19. B
20. D on which to base his arguments in favor of the new theory = The professor will base his arguments in favor of the new theory on sufficient grounds.
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