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科目： 來源：同步題 題型：單選題

- Why does the lake smell terrible?
- Because large quantities of water  ________ .             
[     ]
A. have polluted    
B. is being polluted    
C. has been polluted    
D. have been polluted

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科目： 來源：模擬題 題型：單選題

Jane was elected chairman of the committee. This is the first time that a woman ______ to the post.
[     ]
A. has appointed    
B. had appointed
C. has been appointed
D. had been appointed

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科目： 來源：模擬題 題型：單選題

This is the second time Nie Haisheng ________ to be the astronaut who took the glorious task.
[     ]
A. chose    
B. had been chosen  
C. was chosen    
D. has been chosen  

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科目： 來源：期中題 題型：單選題

Steven ________ since he got out of work three weeks ago.
[     ]
A. has been unemployed
B. was unemployed
C. had been unemployed
D. has unemployed

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科目： 來源：同步題 題型：單選題

— How long____at this job?  
— Since 1990. 
[       ]
A. were you employed  
B. have you been employed  
C. had you been employed  
D. will you be employed

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科目： 來源：黑龍江省月考題 題型：單選題

Up to now, large quantities of food ____ to Africa to save the starving people.  
[     ]
 A. is sent
B. has been sent
C. have been sent
D. are sent

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科目： 來源：廣東省期末題 題型：單選題

Every possible means ________ to prevent the air pollution, but the sky is still not clear.
[     ]
A. has been used
B. are used
C. is used
D. have been used

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科目： 來源：山東省期末題 題型：單選題

Every possible means _______ to prevent the air pollution, but the sky is still not clear.
[     ]
A. is used
B. are used
C. has been used
D. have been used

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科目： 來源：福建省期末題 題型：單選題

The construction of the two new railway lines ________ by now.
[     ]
A. had completed
B. have been completed
C. has been completed
D. had been completing

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科目： 來源：上海市期末題 題型：單選題

For a long time we        that going to university and getting a degree will ensure a financially stable future.
[     ]
A. are told
B. have told
C. have been told
D. tell

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