11.Black boxes(黑匣子) are special instruments.They are mainly used on planes to record all in-flight information.They are the most important tools to help people find out the reasons of air accidents.
A plane often carries two black boxes-the Digital Flight Data Recorder which can record data about the speed,direction,while the Cockpit Voice Recorder keeps conversations and other sounds in the pilots'cabin (驾驶舱).
They are wrapped (包裹) with thick steal and other special materials that can stop high temperature.They often are placed on the tails of planes,which are considered the safest places of planes,so that they can't be destroyed badly when air accidents happen.
They are not black,instead,they are colored orange to make them easy to see.Because the instruments are often burned and turned into black after air accidents,people often call them black boxes.
They can survive (幸存) in as deep as 6,000meters underwater or a very high temperature-one hour at 1,100degrees centigrade.They can send signs for one month so that people can find them.
Not all black boxes work well after air accidents.Luckily,nine out of ten of them can be explained.They have helped people find out the reasons of many air accidents so far.
 32.What can a black box do?B
A.Help the pilots drive the plane.
B.Record some information about plane.
C.Avoid air accidents.
D.Keep passengers feel comfortable during flying.
 33.Where are black boxes often placed?D
A.In the pilots'cabin.
B.In the front of the plain.
C.On the wings of the plane.
D.At the tail of a plane.
34.Which of the following is Wrong?D
A.There are often two black boxes on a plane.
B.Black boxes are made of special materials.
C.Black boxes can keep sending signs for a month.
D.All black boxes can tell what happened after air accidents.
 35.What does the passage mainly tell us?A
A.What are black boxes.
B.How do black boxes work.
C.What are black boxes made of.
D.How can black boxes be found.
10.One rainy evening I went to fill up at the gas station.A poor boy came up to my car and asked me for money to help him and his mother stay in their hotel for another week.He had to leave if they did not come up with 25.Having worked in social services before,and being a little skeptical,I asked why his mother hadn't asked social services for help.The boy said that they needed to remain in their hotel for one more week until his grandmother,who lived out of town,could take them in.I gave the boy what I had--5.He thanked me and continued to ask others for help.I got my gas and drove away.Weeks before,a boy asked me for money and I told him I didn't have any though I did because I didn't believe him.Later,I knew the boy was really poor."This time,"I thought,"I'll do it differently."I went to my bank and got 20,then I returned to the gas station.The boy was still there.I handed him the 20 bill.He reached through my car window and gave me a huge hug.His hug told me all I needed to know--that finally this kid could get out of the rain.
21.Why did the boy ask for some money?A
A.Because he needed to pay for the hotel.
B.Because he wanted to buy some food.
C.Because his mother was ill and needed to see a doctor.
D.Because he wanted to buy some nice toys.
22.What did the writer tell the boy to do?B
A.Ask others for help.B.Get help from social services.
C.Visit his grandmother.D.Stay in a social service.
23.What happened to the writer weeks before?D
A.He helped another boy.
B.He couldn't help a boy because of shorting of money.
C.He met another boy in the same gas station and helped him.
D.He refused to help a poor boy.
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