2. 外语
  3. Acute hearing helps most animals sense the approach of thunderstorms long before people______.

Acute hearing helps most animals sense the approach of thunderstorms long before people______.

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问题 Acute hearing helps most animals sense the approach of thunderstorms long before people______.
选项 A、do
B、hear
C、do them
D、hearing it
答案A
解析 动词性替代题。题意：“敏锐的听觉使得大多数动物在人类听到之前便已察觉到雷暴的来临。”do替代了句子中的sense the approach of thunderstorms，故A为正确答案。
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