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    -Li Ping, your cousin speaks fluent English, like a native speaker. -No wonder. He once in New York for two years as a visiting professor. A. had worked B. has worked C. worked D. has been working 【查看更多】

     

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    —Li Ping, your cousin speaks fluent English, like a native speaker.

    —No wonder. He once _____ in New York for two years as a visiting professor.

    A. had worked              B. has worked C. worked             D. has been working

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    —Li Ping, your cousin speaks fluent English, like a native speaker.
    —No wonder. He once _____ in New York for two years as a visiting professor.

    A．had workedB．has workedC．workedD．has been working

    查看答案和解析>>


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