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科目： 來源：同步題 題型：單選題

Although the causes of cancer         , we do not yet have any practical way to prevent it．    
[     ]
A．are being uncovered    
B．have been uncovering    
C．are uncovering        
D．have uncovered

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科目： 來源：同步題 題型：單選題

With more forests being destroyed, huge quantities of good earth          each year.      
[     ]
A. is washing away              
B. is being washed away      
C. are washing away              
D. are being washed away

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科目： 來源：四川省高考真題 題型：單選題

— Why don't we choose that road to save time?
— The bridge to it _____.
[     ]
A. has repaired
B. is repaired
C. is being repaired
D. will be repaired

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科目： 來源：0112 期末題 題型：單選題

— Have you moved to your new house? 
— Not yet. My house _____.
[     ]
A. has been painted
B. is painted
C. is painting
D. is being painted

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科目： 來源：天津高考真題 題型：單選題

Traditional folk arts of Tianjin like paper cutting _____ at the culture show of the 2010 Shanghai World Expo.

[     ]

A. are exhibiting
B. is exhibiting
C. are being exhibited
D. is being exhibited

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科目： 來源：專項題 題型：單選題

— Did you finish your homework yet?
— Yeah. We turned it in, and now it ____.
[     ]
A. is grading
B. is graded
C. is being graded
D. has graded

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科目： 來源：重慶市期末題 題型：單選題

A new school library __________ here. It is said that they hope to finish it next month.
[      ]
A. will be built        
B. is being built  
C. has been built    
D. is built

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科目： 來源：同步題 題型：單選題

Look! The foreign guests _____ around the factory by Mr Zhang.
[     ]
A. is showing
B. are being shown
C. are being showing
D. have been shown

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科目： 來源：江西省月考題 題型：單選題

— Can I help you, madam?
— No, thank you. I _____ now.
[     ]
A. have been served
B. have served
C. am being served
D. am serving

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科目： 來源：0107 期中題 題型：單選題

With the development of high technology, more and more new things _____ to the field of IT.
[     ]
A. have introduced
B. are being introduced
C. were introduced
D. had been introduced

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