A new eight-kilometer road is under construction that links the port area with motorway system. It is expected to carry 20,000 trucks and cars a day, which greatly reduces the overcrowded traffic in the center of the city. As part of the project, two four-kilometer road tunnels are being built below the central area of the city, one for traffic to the north and the other for the traffic to the south. The two tunnels are about 20 meters below the surface and are 12 meters wide, providing for two lanes of traffic in each direction. 

   In the upper part of the tunnel two air-conditioning pipes remove the waste gas of trucks and cars and keep the quality of air inside the tunnel. The lighting is at the top of the tunnel, practically at its highest point. There will also be electric signs at frequent intervals. They show traffic conditions ahead and can be seen clearly by drivers. The wall is made up of four main elements, which include a waterproofing covering and, on the inside of the tunnel, a concrete lining.

   Each tunnel is roughly round and the lower part of the tunnel is somewhat flat. The surface of the road lies on the base, which is made of concrete and steel. The drainage system, just below the road surface on one side, removes any extra liquid, particularly water. In the event of fire, the fire main, which is made of steel, pipes water to many fire hydrant stations at regular intervals along the length of the tunnel. The fire main is at the side of the tunnel and at the level of the road surface. Other systems in the tunnel will include emergency phones.

Each of the tunnels under construction is _____.

   A. eight kilometers long and twenty meters wide

   B. eight kilometers long and six meters wide

C. four kilometers long and twenty meters wide

   D. four kilometers long and six meters wide

Which part of the tunnel in the diagram is used to pipe out extra water?

   A. 1           B. 3            C. 5               D  6 

Driving in the tunnel, one can know the traffic conditions ahead through______.

  A. the lights                    B. the electric signs    

C. the trucks and the cars          D.  the emergency phones

The passage is mainly about _____.

   A. the construction of a road           B. the design of a road  

   C. the construction of two tunnels      D.the design of two tunnels

   A new eight-kilometer road is under construction that links the port area with motorway system. It is expected to carry 20,000 trucks and cars a day, which greatly reduces the overcrowded traffic in the center of the city. As part of the project, two four-kilometer road tunnels are being built below the central area of the city, one for traffic to the north and the other for the traffic to the south. The two tunnels are about 20 meters below the surface and are 12 meters wide, providing for two lanes of traffic in each direction. 

   In the upper part of the tunnel two air-conditioning pipes remove the waste gas of trucks and cars and keep the quality of air inside the tunnel. The lighting is at the top of the tunnel, practically at its highest point. There will also be electric signs at frequent intervals. They show traffic conditions ahead and can be seen clearly by drivers. The wall is made up of four main elements, which include a waterproofing covering and, on the inside of the tunnel, a concrete lining（混凝土衬砌）.

   Each tunnel is roughly round and the lower part of the tunnel is somewhat flat. The surface of the road lies on the base, which is made of concrete and steel. The drainage system, just below the road surface on one side, removes any extra liquid, particularly water. In the event of fire, the fire main, which is made of steel, pipes water to many fire hydrant stations at regular intervals along the length of the tunnel. The fire main is at the side of the tunnel and at the level of the road surface. Other systems in the tunnel will include emergency phones.

72. Each of the tunnels under construction is _____.

   A. eight kilometers long and twenty meters wide    B. eight kilometers long and six meters wide

   C. four kilometers long and twenty meters wide     D. four kilometers long and six meters wide

73. Which part of the tunnel in the diagram is used to pipe out extra water?

   A. 1           B. 3            C. 5               D  6 

74. Driving in the tunnel, one can know the traffic conditions ahead through______.

  A. the lights                    B. the electric signs    

  C. the trucks and the cars          D.  the emergency phones

75. The passage is mainly about _____.

   A. the construction of a road                         B. the design of a road  

   C. the construction of two tunnels           D.the design of two tunnels

A recent study conducted by the Pine Street Foundation showed that a dog’s nose may have the ability to detect cancer. A dog’s nose, which was the “medical device” used as part of the research, is believed to be among the world’s most powerful olfactory(嗅觉的) sensors. The study was conducted with 169 subjects 55 of which had been diagnosed as having lung cancer, 31 have breast cancer and 83 control subjects——people without cancer. During the study, five professionally trained scent dogs were used to distinguish between the breath samples of cancer patients and those who were healthy. With an average of 90% accuracy, the research was deemed a success.

The Pine Street Foundation conducted its research on the belief that cancer cells give off a different type of metabolic(新陈代谢) waste product than normal cells. According to the study, the difference is so great that it can be detected by a dog’s sense of smell, including both early and late stages of the disease.

In the conclusion of the study the Pine Street Foundation said that even ordinary dogs may be trained to identify the presence of cancer with only a breath sample. The organization also said that dogs can recognize the disease with astonishing amount accuracy and, finally, that the dog’s detection was not hindered(妨碍) by the presence of age, smoking or stage of cancer.

The Pine Street Foundation plans to continue their research and is currently seeking funding to launch new studies.

If we want to add several different detecting examples to the passage, we should write them

        __________.

       A．between paragraph 1 and paragraph 2    B．between paragraph 2 and paragraph 3

       C．between paragraph 3 and paragraph 4    D．before paragraph 1 or after paragraph 4

The best title for this passage might be ______.

       A．Dogs may smell cancer   B．Why dogs can smell cancer

       C．A Study on dogs’ special ability     D．A study on breast cancer

Dogs can smell cancer because ____________.

       A．they can detect faster than man      B．their sense of smell is very sensitive

       C．dogs metabolize the food slowly     D．patients give off bad smell

People can know from the passage _________.

       A．all dogs can be used to smell cancer

       B．it’s not easy to find out cancer in the early stage

       C．most of the research experiments are successful

       D．dogs detect cancer by breathing and feeling

A new study（研究）warns that about thirty percent of the world’s people may not have enough water by the year 2025.

     A private American organization called Population Action International did the new study. It says more than three hundred thirty-five million people lack enough water now. The people live in twenty-eight countries. Most of the countries are in Africa or the Middle East.

     Population Action International researcher Robert Engelman says by the year 2025, about three thousand million people may lack water. At least 18 more countries are expected to have severe water problems. The demand for water keeps increasing. Yet, the amount of water on earth stays the same.

Mr. Engelman says the population in countries that lack water is growing faster than in other parts of the world. He says population growth in these countries will continue to increase.

The report says lack of water in the future may result in several problems. It may increase health problems. Lack of water often means drinking water is not safe. Mr. Engelman says there are problems all over the world because of diseases, such as cholera, which is carried in water. Lack of water may also result in more international conflict. Countries may have to compete for water in the future. Some countries now get sixty percent of their fresh water from other countries. This is true of Egypt, the Netherlands, Cambodia, Syria, Sudan and Iraq. And the report says lack of water would affect the ability of developing to improve their economies. This is because new industries often need a large amount of water when they are beginning.

    The Population Action International study gives several solutions to the water problem. One way, it says, is to find ways to use water for more than one purpose. Another way is to teach people to be careful not to waste water. A third way is to use less water of agriculture.

    The report also says long-term solutions to the water problem must include controls on population growth, It says countries can't provide clean water unless they slow population growth by limiting the number of children people have.

According to the writer’s opinion, the first serious problem caused by lack of water is ______.

   A. health problem  B. war  C. economy  D. industry

Robert Engelman may be _______.

   A. an Englishman  B. an American  C. a Japanese  D. an Australian

Which of the following is NOT the way to solve the water problem?

   A. To control population growth

   B. To teach people not to waste water.

   C. To find ways to use water for only one purpose.

   D. To use less water of agriculture.

What is the main idea of the passage?

    A. How to get more water in the future.     B. Problems caused by water

C. The Lack of water                    D. A new study of water

A sunflower is a sunflower. A mobile phone is a mobile phone. But can you combine the two to do something for your local environment? As early as next year it may well be possible. When you have finished with your mobile phone you will be able to bury it in a garden or a plant pot and wait for it to flower.

A biodegradable (生物所能分解的) mobile phone was, this month, introduced by scientists. It is hoped that the new type of phone will encourage consumers to recycle.

Scientists have come up with a new material over the last five years. It looks like any other plastic and can be hard or soft, and is able to change shape. Over time it can also break down into the soil without giving out any poisonous chemicals. British researchers used the new material to develop a phone cover that contains a sunflower seed. When this new type of cover turns into waste, it forms fertilizers. These feed the seed and help the flower grow.

Engineers have designed a small transparent (透明的) window to hold the seed. They have made sure it only grows when the phone is thrown away. “We’ve only put sunflower seeds into the covers so far. But we are working with plant experts to find out which flowers would perform best. Maybe we could put roses in next time,” said one scientist.

As phone technology is developing so quickly, people are constantly throwing their mobiles away. This means manufacturers are under pressure to find ways of recycling them. Some 650 million mobile phones have been sold this year. Most of them will be thrown away within two years, adding plastic, heavy metal and chemical waste to the environment. A biodegradable cover can offer some relief (缓解) for nature , according to the scientists.

“The seed comes out and the flower grows in the pot so you don’t have to concern yourself with the phone when you have finished using it,” said Kerry Kirwan. She leads the research team, which is based at the University of Warwick in Britain.

What is the purpose of this passage?

A. To tell the popularity of biodegradable cell phones.

B. To persuade the reader to buy the biodegradable cell phone.

C. To discuss the development of phone technology.

D. To introduce an environmentally-friendly cell phone to readers.

People throw away their cell phones most probably because _______.

A．there is something wrong with them

B．no sunflowers can grow out of them

C．they are out of fashion

D．they are becoming cheaper and cheaper

It could be learned from the passage that _________.

A．developing the new type of phone is mainly to protect the environment

B．phone-makers will benefit much more from the new type of phone

C．the new type of phone will certainly be popular with users all over the world

D．the phones that can be recycled are available only in Britain now