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_____ this way, you can work out the math problem. 

A．Of               B．By               C．On               D．In

I live on the twelfth floor of a building. One afternoon I was coming home from a friend’s house. It was just after four o’clock. I got quickly into the lift and pressed Button12.

The lift started to go up, but very slowly . And then, half way up, it suddenly stopped between two floors. I couldn’t understand it. I pressed all the buttons from 1to 14. I called for help very loudly. But nobody answered.

Then suddenly the light went out, and I was alone in the dark. I started to cry and beat the walls of the lift. I cried and cried until I had no voice left. Then, I felt hopeless, and pressed all the buttons with my open hands. And all at the same time, there was a bell far away . It rang and rang. It was the fire alarm(火災(zāi)警報(bào)). I thought the whole building was on fire. I said to god quietly, “Just get me out of here. I’ll never be bad again.”

Just then, I realized the lift was moving very slowly . On the ground floor it stopped, and the doors opened. A man was standing there. “How long have you been there? It is good that you pressed the alarm bell. But haven’t you learned to read at your school?” He pointed at a small piece of paper on the wall beside the lift. It said: “Attention: This lift will be stopped for repairs between 4pm and 5pm on Thursday March 13.”

1.What happened to the lift?

A．It had a fire accident.

B．It stopped half way.

C．It was turned off by the writer.

D．It moved fast up to the top floor.

2.As the situation went on , the writer became________________.

A．more and more sacred.                   B．calmer and calmer.

C．more and more bored.                   D．clearer and clearer.

3.Why did a bell ring from far away.

A．The lift was to start again.

B．The repair worker rang the lift alarm.

C．The building was on fire.

D．the writer pressed the lift alarm bell.

4.Who most probably made the lift move again and go down to the ground to the ground floor?

A．The writer.                            B．The writer’s friend.

C．The man.                              D．The writer’s father.

5.After reading the paper, the writer realized that he/she had _______.

A．escaped from a fire accident

B．made a silly mistake.

C．visited a dishonest friend

D．pressed a wrong button.

　　By the year 2050 there may be 12.5 billion people on the earth. We need to produce more food. One way to produce more food is by growing stronger plants. For thousands of years, farmers pick the best plants for next season to make plants better. It works slowly. Since 1983, scientists have been able to change plants more quickly by changing their genetic material（遺傳物質(zhì)）.Foods from plants grown in this way are called genetically modified foods（轉(zhuǎn)基因食品）or GM foods.

　　By changing the genetic material of a plant, it's possible to make new plants. The new plants are strong against plant diseases（疾病）and help in our diseases. For example, a kind of rice can stop people from becoming blind.

　　Rich countries produce GM foods because they are easy to grow and bring in more money. Poor countries are interested in them because they help produce more food.

　　Making GM foods is only one way of feeding people in 2050. Maybe we'll find better ways in the future.

[　　]

[　　]

A．They make plants strong against diseases.

B．They are unnatural.

C．They can help in human diseases.

D．Both A and C.

[　　]

A．are grown only in rich countries

B．are grown only in poor countries

C．are dangerous

D．are a quick way to produce food