你叫李平，是英语系学生会主席。写一封信给王教授，请他做一个有关中国历史的报告。注意信中要包括目的、时间、日期和地点。

The best title for the passage is “_______”.

• A.How to Reuse Water
• B.Two Solutions to the Problem of Water Shortage
• C.Stop Wasting Our Limited Water
• D.How to Make Use of Seawater

你叫李平，是英语系学生会主席。写一封信给王教授，请他做一个有关中国历史的报告。注意信中要包括目的、时间、日期和地点。

The would “it” in the last sentence refers to _______.

• A.seawater
• B.purified water
• C.the process of getting rid of the salt in seawater
• D.the process of collecting salt from the sea oceans

The following tells us how to reuse the used water. Which is the right order of the passage?

• A.to have the used water filtered
• B.to put chemicals in it
• C.to pipe it to the users
• D.to pipe the used water to be purified to a factory

There wouldnt be enough water for us if we didnt _________.

• A.turn to the oceans for more water
• B.reuse used water and make use of seawater
• C.desalt seawater
• D.take steps to reuse all water on earth

The best title for the passage would be _______.

• A.New Uses For Computers
• B.The Popularity of Home Computers
• C.The Home Computer Industry
• D.Computers At Home

根据以下内容回答下列各题,

The water we drink and use is running short in the world． We all have to learn how to stop wasting our limited water. One of the steps we should take is to find ways of reusing it. Experiments have already been done in this field．

Today in most large cities, fresh water is used only once, then it runs into waste system. But it is possible to pipe the used water to a purifying factory. There it can be filtered and treated with chemicals so that it can be used again, just as it were fresh from a spring.

But even if every large city purified and reused its water, we still would not have enough. Then we could turn to the oceans. All wed have to do to make use of the seawater on earth is to get rid of the salt. This process is called desalinization, and it is already in use in many parts of the world．

The way to stop wasting our limited water is to ________.

• A.do experiments with water
• B.purify the used water and reuse it
• C.use fresh water once again
• D.make use of seawater

In recent years, computers are being made _______.

• A.larger and more expensive
• B.smaller and cheaper
• C.more difficult to use
• D.to work more slowly

Home computers can be used for _______.

• A.writing letters
• B.playing games
• C.doing business
• D.all of the above

Salesmen use computers mainly to _______.

• A.check the list of goods and materials that are kept in the store house
• B.play games for pleasure
• C.talk with their friends
• D.write letters