选出方框内的单词或词组填空，其中有一个单词或词组是多余的
provides in danger live on perfect change describe |
1.If we don't protect the birds, they will be ________
【小题2 Zhalong is one of the world’s most importantwetlands because it _________ food and cover for fish and birds.
2.If we want to learn English better, remember “Practice makes .
3.As we know, tigers meat.
4.Look at some pictures of different kinds of birds carefully, then __________ them.
阅读填词。阅读短文，根据其内容图表中的空格里填入一个恰当的单词。
New Energy in Twenty-first Century
Energy from the wind
Wind is a kind of clean energy, and there is lots of it. But if there’s no wind, there is no wind energy.
Energy from the water.
When water movers from a high place to a lower place, it can make electricity without pollution. However, people have to build dams(水坝), to use this energy, and building dams is very expensive.
Energy from the earth.
There is heat in the rocks under the earth. Scientists use the heat to make geothermal(地热的)energy. This kind of energy is cheap, but it is is only possible in a few places in the world.
Energy from the sun.
Solar panels on the roofs of houses can turn energy from the sun into electricity. Solar power is clean and plentiful. But when the weather is bad, it doesn’t work.
New 1. in 21C | Adervantage | Disadervantages (缺点) |
Wind energy | A kind of 2. energy | If there is no 3. ,there is no wind energy. |
4. energy | Water movers can make electricity without 5. | Building dams is not 6. |
Geothermal(地热的)energy | The 7. in the rocks under the earth can make energy. | Only 8. in a few places |
Solar energy | Solar power is clean and 9. | When the 10. is bad, it doesn’t work. |