Ⅰ. 完形填空。
What's a wetland? Let's learn more about wetlands.
Some areas on Earth's land are 1 by water or have water just below the soil. This may be all year round or for just part of the year. These 2 are called wetlands.
Wetlands come in many forms. These 3 rivers, lakes, swamps (沼泽) and so on. Most large wetland areas have more than one of these forms.
Wetlands are 4 to lots of different animals, such as frogs and snakes. Flying birds, like 5 geese and ducks, rest in wetlands during their long trips. And two-thirds of all the fish we eat 6 at least part of their lives in wetlands.
Wetlands cover only 6 percent of the Earth's surface, 7 they play a big role in nature. They can clean the 8 water from cities and farms. Wetlands can trap pollutants (截留污染物) in the water and keep them in the soil. During heavy rains, wetlands hold a lot of rainwater. What's more, wetlands help slow climate change. They 9 plenty of CO₂ and store it in the soil and plants. Wetlands 10 pull leaves, animal waste and other matter down from the surface of the water. The matter is kept and locked up in the soil.
()1. A. stopped
B. covered
C. controlled
D. polluted
()2. A. ways
B. names
C. habits
D. places
()3. A. express
B. manage
C. include
D. divide
()4. A. home
B. food
C. nature
D. road
()5. A. smart
B. wild
C. weak
D. strong
()6. A. find
B. save
C. play
D. spend
()7. A. or
B. so
C. and
D. but
()8. A. fresh
B. dirty
C. clear
D. cold
()9. A. take in
B. give out
C. take away
D. give up
()10. A. ever
B. still
C. also
D. even

1.B 2.D 3.C 4.A 5.B 6.D 7.D 8.B 9.A 10.C