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    I've been living in the U.S. for 20 years, but seldom so lonely as now. A. have I felt B. I have felt C. I had felt D. had I felt 【查看更多】

     

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    I've been living in the U.S. for 20 years, but seldom          so lonely as now.

    A. have I felt           B. I have felt         C. I had felt          D. had I felt

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