C. an interesting test D. a piece of news

70. At least how many tests were carried out by the scientists referred to in this passage？

A. Three B. Two C. Only one D. No one knows

Passage Three

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 we‘d 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.

71. 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

72. 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

73. There wouldn‘t be enough water for us if we didn‘t _________.

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

74. 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

75. 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

Passage Four

Some people hate everything that is modern.They cannot imagine how anyone can really like modern music；hey find it hard to accept the new fashions in clothing；

they think that all modern painting is ugly；and they seldom have a good word for the new buildings that are being built everywhere in the world. Such people look for perfection in everything，and they take their standards of perfection from the past. They are usually impatient with anyone who is brave enough to experiment with new or to express himself or the age in materials original ways.

It is，of course，true that many artists do not succeed in their work and instead produce works that can only be considered as failures. If the work of art is a painting，the artist‘s failure concerns himself alone，but if it is a building， his failure concerns others too，because it may damage the beauty of the whole place. This does sometimes happen， but it is completely untrue to say，as some people do，that modern architecture is nothing.liuxuepaper.com