20、MacDonald who had spent much of his time         graduating from college back—    packing round Europe，decided last year to settle down．

A．when         B．while            C．since           D．before

20、C

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科目：高中英語 來源： 題型：

 MacDonald who had spent much of his time       graduating from college back―    packing round Europe，decided last year to settle down．

    A．when    B．while    C．since     D．before

 

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科目：高中英語 來源： 題型：

MacDonald who had spent much of his time         graduating from college back—    packing round Europe，decided last year to settle down．

A．when         B．while            C．since           D．before

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