a. performing

b. performed

c. to be performed

d. being performed

b 在让步，时间等状语从句中，如果主从句中主语一致，从句中谓

语含 be动词，可以将从句中的主语和 be 省略，即在how 后加

they(the works) are，再分别与选择项搭配后，就会发现正确答案

是b。

11._____ their real economic situations, they got some relief fund from the government.

a. considering

b. considered

c. having been considered

d. being considered

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.tina _____ have known the truth, or she would have told us.

a. mustnt

b. shouldnt

c. cant

d. neednt

c

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

a

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

dlack 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. in recent years much more emphasis has been put______ developing the students productive skills.

a. onto

b. in

c. over

d. on

d put/ place/ lay emphasis on 是固定搭配，表示强调，注重。

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

d th

e results o

f which 等于whose results，是非限制性定语从句。

17. the organization broke no rules, but ______had it acted responsibly.

a. neither

b. so

c. either

d. both

a