2017届高考英语（重庆专用）二轮精练：选修6 unit5 The Power of nature单元测试_高考复习指南

　　A．Insects migrate with the seasons.

　　B．Wind helps insects greatly in migrating.

　　C．Windsurfing insects have real direction.

　　D．Scientists have trouble in observing insects.

　　答案　C　[主旨大意题。通读尤其从文章第一句：“随着它们的迁徙，蝴蝶和飞蛾在飞行中会选择风向，并且如果它们走错了方向，它们会改变身体的位置”可知：蝴蝶和飞蛾有自己的方向。]

　　69．Scientists originally thought that________.

　　A．insects always waited for their favourable winds

　　B．insects chose the winds they wanted to ride

　　C．insects were just blown about by the wind

　　D．insects positioned themselves in the winds

　　答案　C　[细节理解题。从第一段最后一句“科学家们很长时间以来认为昆虫会任由风的摆布”可知选C项。]

　　70.It is not easy to study the migrating behavior of the insects because________.

　　A．the little creatures can fly very fast

　　B．they have no regular migrating courses

　　C．the wind's direction is hard to foresee

　　D．their flight is long and high above ground

　　答案　D　[细节理解题。从第二段第一句中的“ because

　　many long

　　distant

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