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极端气候频发

Nowadays, as the world's climate changes, extreme weather is becoming more and more. For example, in Britain, there  1. (be) very few tornadoes(龙卷风) in the past. But now, there are more than 50 tornadoes a year. Tornadoes look fascinating on the TV, but it is very  2.(danger) to humans. However, tornadoes are j3. one sign of the world's climate changes. In many 4. (country), there are more floods. In some other places, it is much  5.(hot) than before in summer. W6. do these happen? Because the global temperatures are rising.

However, scientists still don't know enough about the reasons. Some believe the climate changes naturally. But most scientists think the real reason is human activity, such as cutting 7. trees, driving cars too much and so on. I8. we cannot stop the temperatures from increasing, the ice will melt completely one day. As 9. result, sea levels will rise and many islands will disappear forever. So we should work together  to save the earth, and to save  10. (we).

七年级英语语法填空中等难度题

少年,再来一题如何?
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