Ⅶ. 中考趋势 语法填空
根据短文内容，在横线上填入一个适当的单词或括号内单词的正确形式。
Scientists believe the earth is 4.6 billion years old.
1 the mountains, valleys, hills, rivers, deserts and forests we see today are much younger than that. For example, Mount Qomolangma is about 60 million years old and the Amazon rainforest is only 10 million years old.
2 youngest sea in the world is the Baltic Sea, about 15, 000 years old.
The earth
3 (change) all the time because of volcanoes (火山), earthquakes and of course, wind and rain. Some of these changes are very slow and others are quick. Water and ice can make very great changes
4 the planet. For example, glaciers, rivers of ice, can cut through mountains and make lakes and deep valleys. Many volcanoes are under the oceans and sometimes they become new islands. This is happening in the South Pacific, near Tonga.
It’s normal (正常的) for our planet to change, but at the moment, scientists think it’s changing faster than usual. Some deserts are growing and many
5 (forest) are getting smaller. The weather is getting wetter in some places and drier in others, and there are more big storms. According to the research, the sea level
6 (keep) rising in the next hundred years. As a result, many cities will possibly be covered by water and many of the most productive
7 (farm) areas will be lost. Some island countries are
8 (like) to disappear from the map of the world.
These changes will bring great harm to the planet. However, they can be
9 (use) to some people. For example, as the Arctic is getting warmer, some people in Greenland now own businesses and sell vegetables that they grow on
10 (they) land. That wasn’t possible in the far north 50 years ago. Farmers in Greenland like the warm weather and hope it will continue.
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