How serious? Some people think future global warming will cause the sea level 3. _________ (rise)by several metres; others predict severe storms, floods, droughts, famines, the spread of diseases and the disappearance of species.

　　4. _________ the other hand, there are a few people, like scientist George Hambley, who 5. _________ (believe)that we should not worry about high levels of carbon dioxide in the air and 6. _________ the rest of the scientific world’s concerns about global warming are just speculations. They predict that any warming will be mild with few serious 7. _________ (environment)consequences. In fact, Hambley states, “More carbon dioxide is actually a positive thing. 8. _________ will make plants grow quicker; crops will produce more; it will encourage 9. _________ greater range of animals—all of 10. _________ will make life for human beings better. ”

　　答案: 1. accurately

　　2. but 3. to rise

　　4. On

　　5. believe

　　6. that

　　7. environmental

　　8. It

　　9. a

　　10. which

　　Ⅳ. 话题写作

　　根据提示, 利用本单元所学知识, 完成下面的小作文。

　　1. 随着工业的发展, 产生了越来越多的温室气体, 地球正在变暖。(with the development)

　　2. 结果, 海平面在上升, 致使许多沿海城市和动物的栖息地(habitat)处于危险中。(as a consequence)

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