Question

    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)．

Answer

1.were

2.dangerous

3.just

4.countries

5.hotter

6.Why

7.down

8.If

9.a

10.ourselves

【解析】

主旨大意:本文是一篇说明文。随着全球气候变化，极端天气越来越多，本文主要介绍了这一现象及其形成的原因。

1.句意为：例如，在英国，过去很少有龙卷风。分析句子结构可知，空格处作句子谓语，且主语是复数名词tornadoes，所以谓语动词应用复数形式。结合时间状语in the past可知，本句动作发生在过去，应用一般过去时。故填were。

2.句意为：电视上的龙卷风看起来很迷人，但它对人类是非常________。分析句子结构可知，空格处作句子表语，结合句意，龙卷风是危险的，所以本题应填形容词。故填dangerous。

3.句意为：然而，龙卷风________是全球气候变化的一个迹象。结合句意可知，龙卷风仅仅是全球气候变化的一个迹象。结合首字母提示可知，表示仅仅，应用副词just。故填just。

4.句意为：在许多________，洪水泛滥。many修饰可数名词复数。故填countries。

5.句意为：在其他一些地方，夏天比以前________。根据句意，并结合后文than可知，本题应用形容词比较级。故填hotter。

6.句意为：________会发生这些呢？结合后一句的Because可知，此处在问原因，需用why提问。故填Why。注意句首单词首字母应大写。

7.句意为：但是大多数科学家认为真正的原因是人类活动，例如________树木、开车太多等等。根据句意可知，此处表示“砍树”。cut down为固定短语，意为“砍断”。故填down。

8.句意为：________我们不能阻止气温上升，两极的冰终有一天会完全融化。根据句意，此处应填if引导条件状语从句，意为“如果……”。故填If。

9.句意为：________，海平面将上升并且许多岛将会永远消失。根据句意并结合短语as a result可知此处应填冠词a。故填a。

10.句意为：所以我们应该一起努力来拯救地球，拯救________。分析句子结构可知，空格处作句子的宾语，应用人称代词宾格或反身代词。结合句意可知，主语与宾语是同一个人，所以宾语应用反身代词。故填ourselves。