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科目： 來源：陜西省同步題 題型：單選題

Look at the sweat on her face. She________the house since she got up this morning.
[     ]
A. is cleaning  
B. has been cleaned
C. was cleaning  
D. has been cleaning

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科目： 來源：天津同步題 題型：單選題

Mother wanted to be a good provider, a role she________since her marriage to Father.
[     ]
A. shoulders    
B. shouldered
C. is shouldering  
D. has been shouldering

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科目： 來源：福建省同步題 題型：單選題

— Did you find the missing couple in the mountain yesterday?
— No, but we________to get in touch with them ever since.
[     ]
A. have tried  
B. have been trying
C. had tried  
D. had been trying

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科目： 來源：福建省同步題 題型：單選題

One of my high school friends________in London ever since she moved there in 1998.
 [      ]
A. lived  
B. is living
C. lives  
D. has been living

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科目： 來源：陜西省同步題 題型：單選題

The secretary________letters all the afternoon and there are still two letters to finish.
[      ]
A. is typing 
B. had type
C. has been typed
D. has been typing

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科目： 來源：內(nèi)蒙古自治區(qū)模擬題 題型：單選題

Unrest and violence in North Africa and the Middle East ____ at their fastest rate since 2008.  
 [     ]
A. have been raising    
B. have been rising
C. have raised        
D. have risen

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科目： 來源：模擬題 題型：單選題

— That's the third time he's won the award in this field.   
— Yes. He ________ his maximum potential in the past decade.
[     ]
A. explored          
B. is exploring  
C. has been exploring  
D. has explored

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科目： 來源：模擬題 題型：單選題

— Hi, Jack!When did you arrive in Berlin?
— Last weekend. I  __________  a different culture since then.
[      ]
A. was experiencing                
B. will be experiencing
C. have been experiencing            
D. had been experiencing

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科目： 來源：江西省高考真題 題型：單選題

Mother wanted to be a good provider, a role she ______ since her marriage to Father.
[     ]
A. shoulders
B. shouldered
C. is shouldering
D. has been shouldering

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科目： 來源：江蘇高考真題 題型：單選題

— I'm sure Andrew will win the first prize in the final.
— I think so. He ______ for it for months.
[     ]
A. is preparing
B. was preparing
C. had been preparing
D. has been preparing

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