swallows

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In the winter ___do not fly south.A.ducks B.geese C.sparrows D.swallows

选A因为鸭子不会飞

Swallows fly to the south before winter comes .中文,为什么用comes而不用will come ,或is coming,

因为是每年都如此,强调一个客观事实和普遍的规律。

Swallows fly to the south before winter__.

同下。。。。。

swallows are seen flying south to warmer lands,( ) they will find plenty of the small insects on

整句话翻译:燕子被看到正在南飞到温暖的地方,在那里他们会找到大量的他们作为食料的小昆虫。因为逗号后面的非限制性定语从句修饰的是地点状语,所以答案是A where ;on which they feed 其实就是they feed on the small insects的意思,定语从句修饰前面的the small insects,意思是:他们作为食料的仅供参考,满意请采纳,谢谢