问题标题:
Iwasthemiddlechildofthreeandtherewasagapoffiveyearson_____side.A.oneB.eitherC.bothD.none
问题描述:

Iwasthemiddlechildofthreeandtherewasagapoffiveyearson_____side.

A.one B.either C.both D.none

苏建宁回答:
  B
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