2. 考研
  3. When the islands of the West Indies______a matter of debate among archaeologists.

When the islands of the West Indies______a matter of debate among archaeologists.

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问题 When the islands of the West Indies______a matter of debate among archaeologists.
选项 A、were first settled are
B、are first settled was
C、were first settled is
D、was first settled was
答案C
解析 句意：西印度群岛什么时候第一次有人居住这一问题在考古学家中引起了争议。settle的主语是the islands of the West Indies，事情发生在过去，故谓语动词用were。整个句子的主语是when引导的从句，现在在考古学家中引起争议，故谓语动词用单数。现在时。
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