2013英语四级完型填空练习题第003组
Nature has a prefect system for recycling water. Water is used again and again .It falls as rain. -1- it goes one of three places. It might seep slowly through the soil -2- it soaks through into the natural reservoirs -3-. It might disappear into the air by -4- quickly. It might -5- into streams to rivers and to the oceans.There is a problem -6- this recycling system. It is a balance that can be easily -7- by people. Nature‘s recycling system can work well -8- people work with the system-not -9- it. Some ways that people -10- with nature are easy -11-. Dirty sewagewater from homes and factories must not -12- with drinking water. People would get sick from drinking dirty water.
-13- other ways that people hinder nature. Some of these ways are not so easy to understand. -14-, a marshy bog may not be good for everything, but it -15- an important purpose. The soft, wet soil of a bog -16- water to reachthe underground reservoirs. What happens to the balance of nature if the bog is filled in? Many housing development projects have been built -17- marshes once were. The -18- of the houses are likely to have problems. They are likely to -19- water, to flood in -20- seasons. Huge storm sewers are built to carry away with the water from wet areas. These huge pipes prevent wet basements in the houses of teh community.
1. Therefore Then Consequently Nevertheless
2. because if after as
3. in underground below underground underground undergroundly
4. evaporating being evaporated having been evaporated being evaporated
5. run down run away run off run through
6. of with through from
7. upset created discovered invented
8. only before unless although only if
9. by for over against
10. accord concern interfere intervence
11. to be understood understanding to understand being understood
12. separate clean mix filter
13. There are They is These are Those are
14. To start with To name just a few For example In contrast
15. produces serves maintains keeps
16. forbids discourages prevents allows
17. there where which what
18. basis base basic basements
19. come up with fill up with disagree with finish with
20. dry snowy rainy misty
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