Rivers are one of our most important natural resources(自然资源). Many of the world’s great cities are located on rivers, and almost every country has at least one river flowing through it that plays an important part in the lives of its people.

Since the beginning of history, people have used rivers for transportation. The longest one in the United States is the Mississipi. The lifeline of Egypt is Nile. To the people of India, the Ganges is great, but it is also important for transportation; ships can travel along it for a thousand miles. Other great rivers are the Congo in Africa and the Mekong in Southeast Asia. The greatest of all for navigation(航海), however, is the Amazon in Brazil(巴西). It is so wide and so deep that large ships can go about two thousand miles upon it.

Besides transportation, rivers give food to eat, water to drink, water for crops, and chances for fun and recreation for the people who live along their banks. In order to increase the supply of water for crops, engineers sometimes build a dam(大坝) across a river and let a lake form behind the dam. Then people can use the water not only to irrigate(灌溉) their fields but also to make electricity for their homes and industries. However, large cities and industries that are located upon rivers often make problems. As the cities grow in size and industries increase in number, the water in the rivers becomes polluted with chemicals and other materials. People are learning the importance, however, of doing more to keep their rivers clean if they want to enjoy the benefits(利益) of this natural resource.

1.The greatest river for navigation is ________.

A.the Amazon B.the Nile C.the Mississippi

2.Which is WRONG?

A.The Nile is in India.

B.Many cities are located on rivers.

C.Rivers play an important part in the lives of people.

3.From a dam people can use the water for ________.

A.keeping the rivers clean B.washing clothes C.irrigating and making electricity

4.The water in the river is polluted because of ________.

A.people’s building a dam across a river

B.people’s swimming in the river too much

C.chemicals and other materials

5.The best title of the passage is ________.

A.Rivers in Cities B.The Importance of Rivers C.Transportation

As we know, toothpaste(牙膏)is necessary in our life and we use it every day.In fact,it does more than just keep our teeth bright and white.It can be used wisely in many other ways.Here are some useful tips.

Clean a Dirty Mirror

If you want to clean a dirty bathroom mirror, try to put a bit of toothpaste on the mirror and wipe it dry.The glass can be cleaned up beautifully.And doing this can also stop the mirror from fogging.Then you can still see yourself in the mirror after taking a shower.

Remove(移除) the Unpleasant Food Smell

Have some bad food smell, like the smell of onions or fish, on your hands? You can remove it by washing your hands with toothpaste.You’ll be fresh-smelling in no time .

Make Your Sports Shoes Whiter

This time, clean your sports shoes by yourself, not by your mother.Wipe some toothpaste around your shoes and then clean it with a wet cloth.See? Your shoes are white as new! A.little toothpaste also does an amazing job of removing scuffs(磨痕)from leather shoes.Just put a little on the scuffed area and clean with a soft cloth.The leather will look like new.

Keep the Metal(金属) Shining

Rings will get not so bright or shiny over time, yet with a little bit of toothpaste and a good washing, they'll be shining away right away.But do not use it on pearls(珍珠), as it will hurt the surface(表面).

1.The passage is mainly about_________.

A.how we use the toothpaste in other ways B.where to buy cheaper toothpaste

C.what we need to make the toothpaste D.why we use the toothpaste to brush teeth

2.With the help of the toothpaste, the mirror will be_________.

A.white B.foggy C.clear D.warm

3. According to the passage, we can do many things with the toothpaste except(除了)_________

A.stop the mirror from fogging B.remove some bad food smell

C.keep pearls bright D.keep the rings shining longer

4.In which column(栏目 )of the newspaper can we find the passage?

A.Life. B.Culture. C.travel. D.Health.

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