北京市2010年中考英语模拟试题及答案(5)

　　VII.阅读理解(20分，每小题1分)

　　阅读下列短文，从下面每小题的A. B C D 四个选项中选择最佳选项，并在答题卡上将相应的字母编号涂黑。

　　( A)

　　The world is not only hungry, but it is also thirsty for water. This may seem strange to you, since nearly 70% of the earth’s surface (表面 ) is covered with water. But about 97% of that is sea water ,or salt water. Man can only use the other 3%---the fresh water from rivers, lakes, underground, and other sources(源泉 ). And we can not even use all of that. Even worse, some of it has been made dirty.

　　However, as things stand today, this fresh water is still enough for us. But our need for water is becoming larger and larger quickly---- almost day by day. We should take steps to do with this problem now and in this way we can get away from a serious world---wide water shortage(缺乏 ) later on.

　　We all have to learn how to stop wasting(浪费 ) our valuable water. One of the first steps is to develop (开发 ) ways of reusing it. Today in most large cities, water is used only once and then sent out into a sewer system(下水道 ). From there it returns to sea or runs into underground places.

　　But even if every large city reused its water, we still would not have enough. All we’d have to do to make use of sea water in the world is to remove the salt. If we take these we will be in no danger of drying up.