| 听短文，选择正确答案。短文读两遍。 |
| 1. What do many places in the world need today? |
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| A. More sea water. B. More clean water. C. More fresh water. |
| 2. How many ways does this passage tell us to get fresh water from the sea water? |
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| A. One way. B. Two ways. C. Three ways. |
| 3. Which way costs more money, but works faster than the sun? |
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| A. The way of heating the sea water. B. The way of making the sea water cold. C. Neither of the above. |
| 4. What does the passage mainly talk about? |
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| A. What do many places in the world need. B. Why to turn salt water into fresh water. C. How to turn salt water into fresh water. |
| 5. Which way is the best to get more fresh water? |
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| A. Heating the sea water. B. Making the sea water below zero. C. The way to spend the least money but to get the most fresh water. |