During the mid­1960s，Vinh Linh，Quang Tri in Vietnam was a wasteland，which was often under attack from the US air force.Vietnamese soldiers who were fighting against the US discussed how to make people there safe.Some suggested moving the people underground.Then they began to build a tunnel (隧道)．

The Vinh Moc tunnel was built for the people of Son Trung and Son Ha in Vinh Linh county of Quang Tri Province.It was built in several stages，beginning in 1966 and was in use until 1971.It grew to include wells，kitchens，rooms for each family and hospitals.Around 60 families lived in the tunnel.

Deep under the ground，hidden from soldiers，people lived in the tunnel for many years.They survived.The tunnel was a success and no villagers lost their lives thanks to it.

During that time,17 children were born in the tunnel，each of whose lives was a proof that the tunnel was effective in protecting the villagers.As time goes by，it has become both a historical site and a tourist attraction for people wishing to learn about a heroic period in Vietnam’s history.

The total length of the tunnel network is nearly 2 km，and has three floors.It was built over two years.The two sides have small houses every 3m.The tunnel center has a 150­seat hall，a hospital and maternity rooms (产房)．It is linked to the sea by seven exits，which also function as ventilators (通风设备)，and to a nearby hill by another six.

60．What does the Vinh Moc tunnel have according to the passage?

A．Kitchens，hospitals and a hall.

B．Wells，windows and kindergartens.

C．Kitchens，kindergartens and hospitals.

D．A hall，maternity rooms and schools.

61．The villagers living in the tunnels were________during those years.

A．awful                    B．safe 

C．poor                     D．generous

62．According to the passage，the Vinh Moc Tunnel________.

A．is nearly 2km in length with bad ventilation

B．had been built for 7 years before it came into use

C．is a place that shows the bravery of the local people

D．was first built as a base for the Vietnamese army

63．What is the best title for the passage?

A．How to protect the Vinh Moc tunnel.

B．A painful memory of the Vietnam War.

C．The wisdom and bravery of the Vietnamese.

D．The Vinh Moc tunnel—a famous historical relic in Vietnam.

.

     Scientific experiments can sometimes go wrong and when they do, the results may range from the disastrous to the troubling. One such experiment took place in South America about fifty years ago. Whether its final consequences will cause serious damage or nothing more than a small trouble still remains to be seen.

       The story began in 1956 when an American scientist working in Brazil decided to solve the problem of increasing the productivity of that country’s bees. He imported a very active type of African bee from Tanzania and mated (交配) it with the more easygoing native variety to produce a new kind of bees. The new bees worked harder and produced twice as much honey. It seemed that Professor Kerr, for that was the scientist’s name, had a total success on his hands.

       Then things began to go wrong. For some reason as yet unseen, but perhaps as a result of something in their environment, the new bees began to develop extremely attacking personalities. They became bad-tempered and easy to be angry, attacked the native bees and drove them from their living places.

       But worse was to follow. Having taken over the countryside, the new bees, with their dangerous stings (叮) , began to attack its neighbors—cats , dogs, horses, chickens and finally man himself. A long period of terror began that has so far killed a great number of animals and about 150 human beings.

       This would have been enough if the bees had stayed in Brazil. But now they are on the move, heading northwards in countless millions towards Central and North America, and moving at the alarming speed of 200 miles a year. The countries that lie in their path are naturally worried because it looks as if nothing can be done to stop them.

60. Which of the following statements is right?

A. The results of the South American experiment have caused a serious trouble.             

B. Scientific experiments in South America have proved to be wrong.

C. The results of the South American experiment are not yet certain.                     

D. It’s clear that scientific experiments in South America are not important.

61. The experiment mentioned in this passage was designed to _________.

       A. increase the amount of honey in Brazil

       B. make Brazilian bees more easy-going

       C. increase the number of bees in Brazil

       D. make African bees less active

62. Which of the following may be the cause of the new bees attacking personalities?

       A. Their production of honey.          B. Their hard work.

       C. Their living environment.                D. Their bad temper.

63. The last paragraph implies that __________.

       A. the bees have been driven to Central and North America

       B. The bees may bring about trouble in more countries

       C. the bees must be stopped from moving north

       D. the bees prefer to live in Brazil

Scientific experiments can sometimes go wrong and when they do the results may range from the disastrous to the troubling. One such experiment took place in South America about fifty years ago. Whether its final consequences will cause serious damage or nothing more than a small trouble still remains to be seen.

The story began in 1956 when an American scientist working in Brazil decided to solve the problem of increasing the productivity of that country’s bees. He imported a very active type of African bee from Tanzania and mated(交配) it with the more easygoing native variety to produce a new kind of bees. The new bees worked harder and produced twice as much honey. It seemed that Professor Kerr, for that was the scientist’s name, had a total success on his hands.

Then things began to go wrong. For some reason as yet unseen, but perhaps as a result of something in their environment, the new bees began to develop extremely attacking personalities. They became bad-tempered and easy to be angry, attacked the native bees and drove them from their living places.

But worse was to follow. Having taken over the countryside, the new bees. With their dangerous stings(叮), began to attack its neighbors —cats,dogs,horses, chickens and finally man himself. A long period of terror began that has so far killed a great number of animals and about 150 human beings.

This would have been enough if the bees had stayed in Brazil. But now they are on the move, heading northwards in countless millions towards Central and Notth America, and moving at the alarming speed of 200 miles a year. The countries that lie in their path are naturally worried because it looks as if nothing can be done to stop them.

56.The results of the South American experiment ____________

A. have caused a serious trouble       B. have proved to be wrong

C. are not yet certain                D. are not important

57.The experiment mentioned in this passage was designed to _________

A. increase the amount of honey in Brazil   B. make Brazilian bees more easy-going

C. increase the number of bees in Brazil     D. make African bees less active

58.Which of the following may be the cause of the new bees’ attacking personalities?

A. Their production of honey      B. Their hard work

C. Their living environment       D. Their bad temper

59.The last paragraph implies that_____

A. the bees have been driven to Central and North America

B. the bees may bring about trouble in more countries

C. the bees must be stopped from moving north

D. the bees prefer to live in Brazil.

      Scientific experiments can sometimes go wrong and when they do the results may range from the disastrous to the troubling. One such experiment took place in South America about fifty years ago. Whether its final consequences will cause serious damage or nothing more than a small trouble still remains to be seen.

      The story began in 1956 when an American scientist working in Brazil decided to solve the problem of increasing the productivity of that country's bees. He imported a very active type of African bee from Tanzania and mated  (交配)  it with the more easy-going native variety to produce a new kind of bees. The new bees worked harder and produced twice as much honey. It seemed that Professor Kerr, for that was the scientist's name, had a total success on his hands.

      Then things began to go wrong. For some reason as yet unseen, but perhaps as a result of something in their environment, the new bees began to develop extremely attacking personalities. They became bad-tempered and easy to be angry, attacked the native bees and drove them from their living places.

      But worse was to follow. Having taken over the countryside, the new bees, with their dangerous stings (叮) , began to attack its neighbors -- cats, dogs, horses, chickens and finally man himself. A long period of terror began that has so far killed a great number of animals and about 150 human beings.

     This would have been bad enough if the bees had stayed in Brazil. But now they are on the move, heading northwards in countless millions towards Central and North America, and moving at the alarming speed of 200 miles a year. The countries that lie in their path are naturally worried because it looks as if nothing can be done to stop them.

1.The results of the South American experiment              .

     A. have caused a serious trouble        B. have proved to be wrong

     C. are not yet certain                 D. are not important

2.The experiment mentioned in this passage was designed to              .

     A. increase the amount of honey in Brazil      B. make Brazilian bees more easy-going

     C. increase the number of bees in Brazil       D. make African bees less active

3.Which of the following may be the cause of the new bees' attacking personalities?

     A. Their production of honey.        B. Their hard work.

     C. Their living environment.         D. Their bad temper.

4.The last paragraph implies that             .

     A. the bees have been driven to Central and North America

     B. the bees may bring about trouble in more countries

     C. the bees must be stopped from moving north

     D. the bees prefer to live in Brazil