摘要:(五)录音中有一篇短文和五个问题.听短文和问题两遍后.从每小题A.B.C三个选项中.选出能回答每个问题的正确答案. 21. How was the air in London in the 1950s? A. Clean. B. Foggy, C. Dirty. 22. Why did tile air become cleaner in London a few years later? A. Coal was no longer burnt. B. Large factories were closed. C. Large factories were built. 23. What problem do many Chinese cities haw according to this passage'? A. Increasing population. B. Air pollution. C. Limited resources. 24. In China, what's the mare cause of the problem? A. Factories. B. Coal. C. Cars. 25. Why is the air becoming cleaner in China? A. Many factories are being closed and coal is not burnt. B. More and more people are using cleaner fuels in cities. C. Protecting environment is being paid more attention to. (注意:请同学们翻到第Ⅱ卷第五大题.做听力填表题.)

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