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外语
Acute hearing helps most animals sense the approach of thunderstorms long before people ______.[2000]
Acute hearing helps most animals sense the approach of thunderstorms long before people ______.[2000]
admin
2015-04-26
132
问题
Acute hearing helps most animals sense the approach of thunderstorms long before people ______.[2000]
选项
A、do
B、hear
C、do them
D、hearing it
答案
A
解析
在before引导的时间状语从句中使用助动词do来代替sense the approach of thunderstorms,故选项A正确。
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0
专业英语四级
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