2. 外语
  3. The increasing global warming will have a devastating effect on some coastal areas, or ______ many scientists have warned.

The increasing global warming will have a devastating effect on some coastal areas, or ______ many scientists have warned.

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问题 The increasing global warming will have a devastating effect on some coastal areas, or ______ many scientists have warned.
选项 A、so
B、it
C、thus
D、that
答案A
解析 此句为省略句，A so在此代替前面整个句子的内容，放在后半句之前作承前省略。而B it和D．that虽然也可以代替前文的内容，但是它们不能像so那样采用倒装语序，只能用正常陈述语序，即如果这里用it或 that，它们也必须放在动词warned之后。C．thus是一个表示结果的副词，意为“因此”，不能用作代词来代替被省略的内容，如果选择C则动词warned后面缺少宾语。因而本题应该选A。
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