完形填空Passage 13Scientists say that something very serious is

完形填空Passage 13
Scientists say that something very serious is happening to the earth. It will begin to get 1 in the following years. There will be major changes in 2 in the new century. Coastal waters will have a 3 temperature. This will have a 4 effect on agriculture. In northern areas, the 5 season will be ten days longer by the year 2010. However, in warmer areas, it will be too dry. The 6 of water could 7 by eighty percent. This would 8 a large decrease in agriculture production.
World temperature could 9 two degrees centigrade by the year 2040. However, the increase could be three times as great in the Arctic and Antarctic area. This could cause the 10 sheets to melt and raise the 11 of the oceans 12 one to two meters. Many coastal cities would be 13 water.
Why is this happening? There is too 14 carbon dioxide in the air. 15 oil, gas and coal burn, they create large amounts of carbon dioxide. This carbon dioxide lets 16 enter the earth’s atmosphere and 17 the earth. However, it doesn’t let as much heat 18 the atmosphere and enter space. It’s like a blanket. The heat 19 the sun can pass through the blanket to warm the earth. The heat 20 there and can’t escape through the blanket again.
Scientists call this the green-house effect.
1. A warmer B colder C better D worse
2. A land B agriculture C climate D weather
3. A lower B higher C normal D proper
4. A good B general C serious D useful
5. A getting B playing C taking D growing
6. A much B many C amount D number
7. A fall B decrease C refuse D rise
8. A lead B keep C make D cause
9. A increase B drop C lift D realize
10. A water B rain C stone D ice
11. A degree B level C coast D area
12. A by B to C of D with
13. A above B under C below D over
14. A little B many C few D much
15. A If B Because C When D Why
16. A sunlight B air C rain D gas
17. A cold B protect C hurt D heat
18. A enter B get C leave D reach
19. A through B by C from D on
20. A stores B arrives C stands D stays