题型：语法填空（语篇） 题类：常考题 难易度：普通
高中英语-_牛津译林版-_高一上册-_模块2 Unit 1 Tales of the unexplained
If the population of the Earth keeps on increasing at its present rate, there will eventually not be enough resources (leave) to support life on the planet. By the middle of the 26th century, if present trends continue, we （use）up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on the earth will make necessary for us to look for open space somewhere else. But of the other planets in our solar system are capable of supporting life at present. One possible solution the problem, , has recently been suggested by an American scientist, Professor Carl Sagan. Sagan believes before the Earth's resources are (complete) exhausted it will be possible to change the atmosphere of Venus and therefore create a new world almost as large as the Earth .The difficulty is that Venus is much hotter than the Earth. , there is only a tiny amount of water there.
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