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 __________.

admin2014-03-21  40
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 语法规则。do 替代 see the approach of thunderstorms。
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