2. 外语
  3. The large size and roughly circular shape of the Pacific made some scientists think that it ______ a hole left when the moon sep

The large size and roughly circular shape of the Pacific made some scientists think that it ______ a hole left when the moon sep

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问题 The large size and roughly circular shape of the Pacific made some scientists think that it ______ a hole left when the moon separated from the earth.
选项 A、used to be
B、would have been
C、might have been
D、should have been
答案C
解析 根据句子的意思，it might have been a hole只是一种猜测，其他几个选项都不符合要表达的这种逻辑意义。题句意为：“太平洋浩瀚巨大，又略呈圆形，这使得某些科学家认为它也许是月球脱离地球时留下的一个大坑。”
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