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    Right in the middle of the town are some long ponds(水池). They are only about half a foot deep. The men of Symi dug out the earth to make the ponds.
    Over each pond is a low cover. It is made of glass that you can see through.
    At night, sea water is taken into the ponds. The next day, the hot sun shines through the covers. The sun light turns the water into vapor(水蒸气) and the vapor goes up from the ponds. The salt is left behind.
    As it goes, the vapor became mist. On the inside of each cover, the little drops of mist run together to make big drops. These drops run down the sides of the cover, filling other ponds with fresh water.
    The salt left in the ponds is washed out each night. Then more sea water is taken in. The factory is ready for the next day’s work. The covers and other parts of the factory cost very little. Sea water and sun cost nothing. Most people of Symi are poor. So to them this new way of getting fresh water seems wonderful.
    小题1: Where are the little drops made into big drops?
    A．On the inside of the covers.
    B．In the ponds with fresh water.
    C．On the walls of the salt water ponds.
    D．Between the fresh water and the salt water.
    小题2:The men of Symi dug some long ponds        .
    A．in order to keep sea water
    B．in order to get hot water inside
    C．in order to fill them with fresh
    D．in order to get fresh water
    小题3:Which picture shows the right way to get fresh water in Symi?

    小题4:Which of the following is NOT true?
    A．The sea water is taken into the ponds at night every day.
    B．There is a very big river running through the town to the sea.
    C．The people in Symi can get fresh water from the factory.
    D．People may see the water in the ponds through the cover.

    小题1:A
    小题1:D
    小题1:C
    小题1:B

    小题1:根据第二行的第一段On the inside of each cover可知，水蒸气在玻璃内侧形成大的水滴。故选A。
    小题1:根据最后一段的最后一行可知，这是一种新的、经济的获取淡水的方法。人们挖水池是为了获取淡水。故选D。
    小题1:水蒸气变成水滴后会下落，A、B、D三幅图中，水滴会重新落入海水中，不能获得淡水。而C项所示的是，水滴流到外侧，再流进其它的池子里。故选C。
    小题1:根据第一段的第四行可知，A项正确；根据最后一段可知，C项正确；根据第一段的第三行“...you can see through”可知，水池上面用玻璃覆盖，人们可以看到水池里面，D项正确。故选B。
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