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题库 / OG2017V-SC-301
Inuits of the Bering Sea were in isolation from contact with Europeans longer than Aleuts or Inuits of the Noah Pacific and northern Alaska
in isolation from contact with Europeans longer than
isolated from contact with Europeans longer than
in isolation from contact with Europeans longer than were
isolated from contact with Europeans longer than were
in isolation and without contacts with Europeans longer than
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C为什么错
in本身是有含义的，表示在。。里边
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D选项的were为什么不能省略？
因为比较的应该是状态而不是Aleuts or Inuits of the Noah Pacific and northern Alaska
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