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    科目： 来源：重庆市期中题 题型：单选题

    I_____ violin lessons every two weeks, but I think I'll make it every week from next month.
    [     ]
    A. am having      
    B. have had      
    C. have      
    D. have been having

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    科目： 来源：江西省同步题 题型：单选题

    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： 来源：辽宁省期中题 题型：单选题

    —I wonder if you could go with me to the supermarket.
    —Don't disturb me. I _____________my experiment report all the morning and haven't finished yet.
    [     ]
    A. write      
    B. was writing      
    C. have written    
    D. have been writting

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    科目： 来源：同步题 题型：单选题

    Tom ________ in the library every night over the last three months.
    [     ]
    A. works  
    B. worked
    C. has been working  
    D. had been working

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    科目： 来源：同步题 题型：单选题

    We ________ on this project for four hours. Let's have a rest.
    [     ]
    A. are working  
    B. have been working
    C. worked  
    D. had worked

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    科目： 来源：同步题 题型：单选题

    Kate ________ on her new novel, which is supposed to come out next month.
    [     ]
    A. has been working  
    B. had worked
    C. will be working  
    D. was working

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    科目： 来源：同步题 题型：单选题

    The temperature ________ to minus 3 in London and it is likely to get even colder as the day goes on.
    [     ]
    A. will have fallen  
    B. had fallen
    C. has been falling  
    D. falls

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    科目： 来源：同步题 题型：单选题

    The number of foreign students attending Chinese universities ________ rising steadily since 1990.
    [     ]
    A. is  
    B. are
    C. has been  
    D. have been

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    科目： 来源：同步题 题型：单选题

    Ever since my brother graduated from the university, he _______ in the present company for 15 years and he is now chief engineer of the company.   
    [     ]
    A. worked  
    B. has been working  
    C. is working    
    D. works

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    科目： 来源：黑龙江省月考题 题型：单选题

    — I _____ to get through to her all day, but no one answered the phone.  
    — Relax yourself. She will be all right.
    [     ]
    A. try
    B. have tried
    C. have been trying
    D. tried

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