问题标题:
Don'thesitatetodothose-----areworthdoingA.thatB.whichkey:Awhy?
问题描述:

Don'thesitatetodothose-----areworthdoing

A.thatB.which

key:A

why?

龙奕回答:
  指物的不定代词后面只能接that,而指人的不定代词如someone后可以接who作引导词.
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