阅读理解

　　She Nile is a water highway, carrying traffic of all kinds for the people of Egypt. Flat-bottomed boats carry fruits and vegetables from one city to another. There are also passenger boats on the Nile. There boats carry people up and down the river. Very heavy loads can travel by barges. The stone was used to make buildings and monuments.

　　The Nile also provides food for the people of Egypt. Egypt is mostly a desert. Crops will not grow in this desert land. But close to the Nile, crops grow well. In fact, several different crops are often raised on the same land during one year. Water down the Nile helps make the land fertile(肥沃).

　　The Nile’s yearly floods used to benefit the people. Rain falls heavily in the Ethiopian mountains and highlands. The water from these rains flows down into the Nile. The river rises. These early summer rains used to cause floods. The river over flowed its banks and spread over the land. It carried rich soil in land every summer. It also brought water for crops. Fields were more productive after the flood.

1．According to the passage, the Nile is ________ .

[　　]

A．a water highway running through Egypt

B．a highway which carries passengers to Asian countries

C．not only a highway but also full of minerals

D．deep enough to carry ships

2．In the old days, Egyptians liked to ________ .

[　　]

A．use barges to carry fruits and vegetables

B．go up and down the river fishing

C．build their houses with stones

D．build monuments along the river

3．The climate of Egypt is ________ .

[　　]

A．not only not also dry

B．neither hot nor cold

C．warm all the year round

D．fit for all kinds of crops to grow

4．Ancient Egyptians made full use of water in the Nile ________ .

[　　]

A．how Egyptians grasp the chance to grow crops

B．what gifts the Nile brings to Egyptians

C．the position of the Nile

D．life is easy for people by the Nile

   In some countries in which there is very little rain at any time, the farmers have to irrigate their fields. Irrigation is easy enough if there is a great river near the crops, and if there is plenty of water in it. Canals carry the river water to the fields when necessary. In some seasons there may be too much water in the river, and the water may flood all the land near it. At other times the river water may not be enough for all the farmers, and then it will be difficult to irrigate the fields.

   To prevent these difficulties, a dam may be built across the river. This will store water for dry seasons, and in wet seasons it will prevent the flooding of the land. A great lake will, no doubt, be formed behind the dam, and this may mean that houses and fields will be covered with water. Most people will accept that and will be ready to move to other places. Then the country can have the right amount of water at all times; more crops will be grown, there will be more food for everyone, and there will be no more floods.

   Dams have been built for centuries in different parts of the world. Modern dame are usually built of concrete（混凝土）but earth dams were used in India and Sri Lanka about 2500 years ago. There was another across the River Tigris very long ago, and large numbers of irrigation canals were made in Iraq to irrigate the land. The Romans were great dam-builders and there was also a famous dam at Ma’ rubin Arabia.

   We cannot use sea water for irrigation; the salt will not allow the crops to grow. Fresh water is always needed, and it is very difficult and costly to make fresh water from sea water. This is done in a few countries, but the fresh water is for drinking. There is not enough at present for irrigation. Perhaps a scientist will one day invent a cheaper way of producing fresh water from the sea.

1．The first paragraph mainly talks about          .

      A．the problems caused by river water      

       B．the necessity to irrigate the field

      C．the water shortage in some countries    

       D．the canals carrying water to fields

2．A dam is usually built          .

      A．to cover the houses and fields              

B．for people to have the right amount of water at all times

      C．to grow crops better

      D．to form a large lake

3．The underlined word“that”means         .

      A．a dam will be built across the river        

       B．a dam will store water for dry seasons

      C．in wet seasons a dam will prevent the flooding of the land

      D．houses and fields will be covered will water

4．The third paragraph suggests that         .

      A．modern dams are made of concrete      

       B．Romans once built many great dams

      C．there was too much water in 1rap in the past

D．modern dams are better than early dams

　　Water costs money．In some places water is hard  16  ．What  17 when a town has these problems？A small town in California found a happy   18 ．

　　Very 19 rain ever fell there．The town had no water  20  ．The water it used was  21  from a river 300 miles away．As more people   22  live in the town，   23   water was needed．Now water   24  to be brought in from 600 miles away．All these cost  25  money．

　　The town 26 a plan．It found 27   to clean its “dirty” water．Once the cleaned water was reused   28  many ways．Five  29  lakes were built．Here people could swim and fish and go   30   ．They  31  have picnics in their new parks．Farmers had more water  32  their crops．New factories can be built，now that they have the promise of  33  ．

　　In most places，water is used and thrown 34  ．The town that saved  35  water has saved the town！

Water costs money．In some places water is hard 16  ．What 17  when a town has these problems？A small town in California found a happy  18  ．
　　Very 19 rain  fell there．The town had no water  of its 20 ．The water it used was  21  from a river 300 miles away．As more people   22  live in the town，   23   water was needed．Now water   24  to be brought in from 600 miles away．All these cost  25  money．
　　The town 26 a plan．It found 27   to clean its “dirty” water．Once the cleaned water was reused  28  many ways．Five  29  lakes were built．Here people could swim and fish and go   30  ．They  31 have picnics in their new parks．Farmers had more water 32  their crops．New factories can be built，because they have  33 ．
　　In most places，water is used and thrown 34 ．The town that saved  35  water has saved the town！

Water costs money．In some places water is hard  31 ．What 32 when a town has these problems？A small town in California found a happy 33 ．

Very 34 rain ever fell there．The town had no water35 ．The water it used was 36  from a river 300 miles away．As more people  37  live in the town  38  water was needed．Now water  39  to be brought in from 600 miles away．All these cost  40 money．

The town 41 a plan．It found 42   to clean its “dirty” water．Once the cleaned water was reused  43  many ways．Five  44  lakes were built．Here people could swim and fish and go  45 ．They  46  have picnics in their new parks．Farmers had more water 47  their crops．New factories can be built，now that they have the promise of  48 ．

In most places，water is used and thrown 49．The town that saved 50 water has saved the town！

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2.    A．happens     B．happening    C is happened     D．happened

3.    A．key         B．answer       C answering    D．way

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5.    A．of itself   B．of its own  C．for its own    D for itself

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