二、语篇填空。
阅读短文,从方框中选择适当的词并用其正确形式填空,使短文通顺、意思完整。每空限填一词,每词限用一次。
large, we, usual, drop, with, need, but, land, enough, problem
Scientists say we won't see polar bears in 100 years, because the weather gets warm. A study shows that the number of polar bears is 1 . There are two kinds of reasons (原因). One is that the sea ice is melting (融化). Polar bears eat seafood on the ice. If there's no ice, they have to stay on 2 . But the land can't provide them 3 food. The other reason is that mother bears may not be fat 4 to make milk for their babies. And some mother bears could stop having babies.
Polar bears are very 5 land animals. They eat meat. Losing them would bring many terrible 6 .
The Arctic Ocean (北冰洋) is home to about 25,000 polar bears. Arctic sea ice 7 melts in spring and summer, and then grows in autumn and winter. But now, the ice 8 longer time to grow back.
It's time for 9 to protect and save the bears. Holland, one of the scientists of the study, says, "I'm sure there's hope, 10 people must act quickly to make that hope come true."
1. 2. 3. 4. 5.
6. 7. 8. 9. 10.

1. dropping 2. land 3. with 4. enough 5. large
6. problems 7. usually 8. needs 9. us 10. but