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    -- When did it happen? -- At 5:55 a.m. the morning of October 15. A. on B. in C. at D. by 【查看更多】

     

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    —When did it happen?
    —At 5:55 a.m. ______ the morning of October 15.
    [     ]
    A. on
    B. in
    C. at
    D. by

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