4．What is the passage mainly about?

　　A．The beginning of road design.

　　B．The development of transport wheels.

　　C．The history of public transport.

　　D．The invention of fast­moving vehicles.

　　答案　B　[主旨大意题。本文主要讲了轮子的发明和不断改进，介绍了车轮的发展历史。]

　　强化组

　　Passage 1

　　限时：8分钟

　　体裁：议论文　题材：生态环保类　难度：难词数：363

　　[2016·衡水中学月考]

　　Wilderness

　　“In wilderness (荒野) is the preservation of the world.” This is a famous saying from a writer regarded as one of the fathers of environmentalism. The frequency with which it is borrowed mirrors a heated debate on environmental protection: whether to place wilderness at the heart of what is to be preserved.

　　As John Sauven of Greenpeace UK points out, there is a strong appeal in images of the wild, the untouched; more than anything else, they speak of the nature that many people value most dearly. The urge to leave the subject of such images untouched is strong, and the danger exploita- tion(开发) brings to such landscapes (景观) is real. Some of these wildernesses also perform functions that humans need—the rainforests, for example, store carbon in vast quantities. To Mr Sauven, these “ecosystem services” far outweigh the gains from exploitation.

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