Scientists also agree that the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide.On the one hand，Dr Foster thinks that an increase of five degrees would be a__6__.Scientists can't predict the climate well enough to know what to expect.

　　On the other hand，a scientist，George Hambley predicts that any warming will be mild with few bad environmental__7__.He__8__ that more carbon dioxide will encourage a greater__9__of animals－all of which will make life for human beings better.

　　However，greenhouse gases continue to__10__ in the atmosphere and the climate is going to keep on warming.

　　答案　1.doubt　2.phenomenon　3.quantities of　4.fuels

　　5．go up　6.catastrophe　7.consequences　8.states　9.range　10.build up

　　Ⅴ.单项填空　

　　1．The old engineer's eyes still shone bright in the wrinkled brown face and his step as he came across the room was________，though slow.

　　A．shaky

　　B．heavy

　　C．casual

　　D．steady

　　答案　D　[考查形容词词义辨析。shaky摇动的；heavy重的；casual随便的；漫不经心的；steady平稳的，稳定的。根据句意可知选择D项。]

　　2．—Why does the lake smell terrible?

　　—Because large quantities of water________.

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