This is a street crossing. There are red and green lights at each corner. Drivers must watch the lights carefully.

When there is a green light, the cars may go. When there is a red light, the cars must stop. They must wait until the red light changes to green. Then they can go on. Sometimes the cars want to make a right turn or a left turn. They can make a right turn when the light is green or red. But they must wait until the green light is shining if they want to turn left.

Some people are color-blind(色盲). They can not tell the difference between the red and green lights. These people must not drive, or there will be accidents. We must keep our streets safe.

(   )46.Drivers must watch _____ carefully at each corner.

A.green lights                  B.red lights

C.both green lights and red lights             D.orange lights

(   )47.When there is a red light _____ .

A.the cars must stop                           B.the cars may go on

C.the cars may make a left turn D.the cars may take a right or left turn

(   )48.Cars can make a right turn when _____ .

A.there is a red light                         B.there is a green light

C.there is a red or green light D.there is no light

(   )49.Color-blind people may have accidents because _____ .

A.they can’t see cars         

B.they can’t see the lights

C.they can’t tell the difference between the red and green lights

D.they can’t hear cars

(   )50.According to (根据) the passage _____ must not drive.

A.young people                  B.women

C.color-blind people                           D.old men

New York (纽约), London, Paris (巴黎) and other big cities are good places to live in.There are a lot of interesting things to see and to do.You can go to see different kinds of museums, plays (戏剧) and movies. You can also buy things from all over the world.

But there are serious problems in big cities, too. It’s expensive(昂贵的)to live there. And there are many people in big cities. Every year, many people move to the cities to find jobs (工作), to study at schools and to receive good medical care(接受良好的医疗服务). But sometimes, these people can’t find work or good places to live in. Also, it is hard to keep cities clean and safe (安全的).

Some people like living in big cities. But before they move to a big city, they should think about the problems of living there.

(   )41.In big cities people can _____ .

A.go to see different kinds of museums

B.see all kinds of plays and movies

C.buy things from all over the world

D.A, B and C

(   )42.Which of the following sentences is right?

A.In cities people can easily (容易地) find good places to live in.

B.Big cities are not clean and safe enough.

C.People can always find work in a big city.

D.All the people like living in big cities.

(   )43.In this passage(短文)the writer thinks it’s right for people _____ .

A.to move to big cities

B.not to live in big cities

C.to move to big cities without (不用) thinking about any problems

D.not to move to big cities before they think about the problems of living there

(   )44.This passage doesn’t tell us that _____ .

A.Paris is a good place for people to live in

B.big cities have many serious problems

C.big cities are better than(比)small cities

D.people can receive good medical care in big cities

(   )45.Which is the best title(题目)for the passage?

A.Big Cities

B.Interesting Things in Big Cities

C.Good Schools in Big Cities

Mrs. King is a doctor from the U.A.S. She is now in China. She works in a Children’s Hospital in Beijing. She is also learning Chinese medicine(医术) there. She likes Chinese medicine very much. She loves working for children. She works hard in the day and reads English books on(关于) Chinese medicine at night. She learns Chinese from the Chinese doctors and her Chinese friends. Now she can speak some Chinese. She can read some Chinese books, too.

Her husband Mr. King is a teacher. He teaches English in a junior high school in Beijing. He works hard, too. He works from Monday to Friday. He teaches three classes every day. Sometimes, on Saturdays and Sundays, he teaches other English classes. He wants to make more money (挣更多钱).

(   )36.Mrs. King works in a _____ .

A.shop                          B.junior high school in Beijing

C.hospital in Beijing           D.hospital in America

(   )37.Both of the Kings _____ .

A.live in America                              B.live in Shanghai

C.work hard                     D.work every day

(   )38.Mr. King works _____ .

A.in a junior high school in Beijing

B.in a Children’s Hospital in Beijing

C.in a junior high school in America

D.in a Children’s Hospital in America

(   )39.Mrs. King learns Chinese from _____ .

A.her teacher                   B.the books

C.the doctors                   D.the Chinese doctors and her Chinese friends

(   )40.Which of the following sentences is NOT true?

A.Mrs. King can speak English and Chinese.

B.Mrs. King knows nothing (一点儿也不懂) about Chinese medicine.

C.Mrs. King is from America.

D.Mr. King sometimes teaches other English classes on weekends.

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