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    29． the theory, the scientists asked more than sixty college students to take part in the experiment. A．Being tested B．To test C．Testing D．Tested 【查看更多】

     

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    ______ the theory, the scientists asked more than sixty college students to take part in the experiment.
    [      ]
    A. Being tested  
    B. To test
    C. Testing  
    D. Tested

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    _____ the theory, the scientists asked more than sixty college students to take part in the experiment.

    [     ]

    A. Being tested
    B. To test
    C. Testing
    D. Tested

    查看答案和解析>>

    　　　 the theory, the scientists asked more than sixty college students to take part in the experiment.

    　 A．Being tested B．To test　　 C．Testing　　 D．Tested

     

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    ________ the theory，the scientists asked more than sixty college students to take part in the experiment.

    A．Being tested  B．To test

    C．Testing  D．Tested

    查看答案和解析>>


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