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

游客2024-09-21 22

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

解析本题由before引导的从句中，people的谓语与主句中宾语animals的补语动词(sense)相同，因此为避免重复由助动词do替代。

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