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Scientists say most polar bears(北极熊) could disappear by the end of the century because of global warming.
According to a study in Nature Climate(气候) Change, the number of most polar bears will 1 rapidly(快速地) by 2080. There are two reasons. One is that the sea ice is melting(融化). Polar bears catch seals(海豹) to eat on the ice. Without ice, they have to 2 on land. But there is no 3 food on land to support so many polar bears. The animals could die from hunger. The other reason is that mother bears may not be fat enough to 4 milk for their babies, so some bears could stop having babies.
Polar bears are the 5 land animals that eat meat on the planet. They help control other kinds of animals. Losing them would break the balance of their living place.
The Arctic is the 6 to about 25,000 polar bears. Arctic sea ice usually melts in spring and summer, and then grows in winter. But now, the 7 is taking longer to grow back. Scientists say the Arctic is warming twice as fast as the rest of the planet.
The study also shows that it is 8 to slow Arctic melting. Greenhouse gases(温室气体) could lead to climate change. In order to avoid creating greenhouse gases, the world should try to stop burning coal and driving cars.
Saving the bears 9 us. Holland, one of the writers of the study, says, “I believe there is hope, but humans need to act 10 to make that hope come true.” Let’s take action to protect our earth and save polar bears.
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Scientists say most polar bears(北极熊) could disappear by the end of the century because of global warming.
According to a study in Nature Climate(气候) Change, the number of most polar bears will 1 rapidly(快速地) by 2080. There are two reasons. One is that the sea ice is melting(融化). Polar bears catch seals(海豹) to eat on the ice. Without ice, they have to 2 on land. But there is no 3 food on land to support so many polar bears. The animals could die from hunger. The other reason is that mother bears may not be fat enough to 4 milk for their babies, so some bears could stop having babies.
Polar bears are the 5 land animals that eat meat on the planet. They help control other kinds of animals. Losing them would break the balance of their living place.
The Arctic is the 6 to about 25,000 polar bears. Arctic sea ice usually melts in spring and summer, and then grows in winter. But now, the 7 is taking longer to grow back. Scientists say the Arctic is warming twice as fast as the rest of the planet.
The study also shows that it is 8 to slow Arctic melting. Greenhouse gases(温室气体) could lead to climate change. In order to avoid creating greenhouse gases, the world should try to stop burning coal and driving cars.
Saving the bears 9 us. Holland, one of the writers of the study, says, “I believe there is hope, but humans need to act 10 to make that hope come true.” Let’s take action to protect our earth and save polar bears.
(
B
)1. A. develop B. fall C. rise D. improve(
C
)2. A. train B. hide C. stay D. pass(
A
)3. A. enough B. good C. sweet D. delicious(
D
)4. A. protect B. remind C. return D. provide(
A
)5. A. largest B. loveliest C. simplest D. luckiest(
D
)6. A. room B. family C. garden D. home(
B
)7. A. sea B. ice C. plant D. animal(
C
)8. A. interesting B. unfair C. possible D. usual(
A
)9. A. is up to B. is used to C. is good with D. is ready to(
C
)10. A. widely B. slowly C. quickly D. quietly答案
1.B 2.C 3.A 4.D 5.A
6.D 7.B 8.C 9.A 10.C
6.D 7.B 8.C 9.A 10.C
