四级练习2015.11.20
[audio]http://sound.yywz123.com/tingbbs/cet4/cet420151120.mp3[/audio]Whales are fast disappearing from the earth.However, surprisingly, they may be saved by a desert plant that is less than a meter high.The jujube plant is a bush that grows only in southern California,in southern Arizona, and on the West Coast of Mexico.(1)_________________________.It is already being used in shampoo and lipstick.It can be used as an industrial oil, too.It may be possible to use the fruit to make animal feed.For centuries Indians in Arizona have gathered the jujube fruit.(2)_________________________.Now scientists have planted experimental crops.They say that Indians and other people can earn money from jujube farming.Although the jujube grows naturally only in the Arizona Sonora Desert,it can be planted in most dry areas of the world.It needs very little water and can grow on poor land.Jujube farms could not only produce oil but could also help stop the growth of deserts.(3)_________________________.
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