问题标题:
It'snecessarythatanefficientworker____hisworkontime.A.accomplishesB.canaccomplishC.accomplishD.willaccompilsh
问题描述:

It'snecessarythatanefficientworker____hisworkontime.A.accomplishesB.canaccomplishC.accomplishD.willaccompilsh

孟智强回答:
  c(should)do   should可省略
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