内容正文:
Passage 1(原创)
have so harm money leaf
basket cut another farmer America
Forests of the longleaf pine trees(松树) once covered two-thirds of the southeastern United States. But about 95 percent of those forests have been lost in the past 100 years. Now, instead of 1 down the trees to use as building materials, 2 and landowners in the southeastern U.S. are finding ways to make 3 from the living trees.
One way to get income is by selling the 4 of the trees as ground cover. It lasts a long time, is light weight and stays in place because the needles connect to each other. And, it does not attract 5 insects!
Some native 6 tribes (部落) make baskets of the long needles of the longleaf pine. A 7 made of the pine needles by native American artists can sell for as much as $750.
8 way forests can produce income is by hunting animals. Wild boars—a kind of pig—live in some forests. Their population 9 been growing out of control in recent years. The animals can damage the young longleaf pine trees, 10 landowners want to reduce the number of them. Hunting boars is a popular sport in the southeastern U.S. and the right to hunt on land can cost from $200 to $1,000 a day.
1. cutting 2. farmers
3. money 4. leaves
5. harmful 6. American
7. basket 8. Another
9. has 10. so
Passage 2(原创)
correct true doubt heat able
time when point use increase
Put a frog in a pot of water. 1 it. The temperature of the water will begin to rise. The frog, which you will observe, will continue to adjust (适应)to the change in temperature. It will continue as the temperature 2 .
Just when the water is about to reach the boiling 3 , the frog will lose its 4 to adjust. It will then make a try to jump. But all its effort will be 5 , because it will have used all its strength to adjust to the temperature.
And within no minute, the frog will die. What kills the frog?
Most of you might think it's the b