Last week, I bought an alarm system for about $ 450. It consisted of a control unit with three small units. I put the control unit in the sitting-room and fastened the other units by the front door, back door and living-room windows. The instructions told us to choose three numbers, so we chose 4, 9 and 1, the last three numbers of our telephone number.

Now I must explain how the alarm works:

l There is a power siren(警报器) in the control unit. It makes a very loud noise.

2 Each of the small units sends out beams or rays in different directions. If anything moves, it breaks a beam. This sends a signal to the control unit. The siren makes a noise which you can hear 50 meters away.

3. When we go to bed, I press the three buttons numbered 4, 9 and 1. Then we have 30 seconds to get out of the room before the alarm starts to work.

That night I slept soundly because I was sure that no burglar(夜贼) could get into our house. However, at about 2:10 a. m., I woke up and heard the siren. “There must be a burglar in the house,” Mary said. “What shall we do?”“I’ll go and see who’s there,” I said. “Stay here. Don’t make a noise.”I went downstairs quietly. When I reached the living-room, I switched on my torch and looked round the room. Then I turned the light on. I switched the siren off and searched the rooms downstairs. There was nothing wrong except that the back door was unlocked. I locked it, reset the alarm and went back to bed. About an hour later, the alarm started again. I jumped out of bed, fell over a chair in the dark and bumped into the bedroom door. Mary woke up and started hitting me with a torch. “Hey! Wait a minute!” I whispered. “It’s only me. I’m going downstairs to see what’s wrong.”I went down into the living-room and listened for a moment. The only sound I could hear was the siren. I turned on the light and then switched the siren off. As I did so, I glanced across at the curtains in front of the windows. I saw a house lizard (a kind of small animal) disappear behind the curtains.“Oh!” I said to myself. “That’s our burglar. ”When the lizard moved, it started the siren. I guessed that the alarm had been made in Europe, where there are no house lizards. Well. I won’t finish this story but if you want an alarm system free of charge, let me know. I’ll send you ours. We bought a dog this morning. It knows the difference between a lizard and a burglar.

1.The writer bought an alarm system to ________.

2.The purpose of the three units was to________.

3.If the writer set the alarm and remained in the room for more than half a minute, _______.

4.The purpose of the writer in writing the passage is to ________.

? 假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两赴，每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（八），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1．每处错误及其修改均限一词。

????? 2．只允许修改10处，多者（从第11处起）不计分。

When I was a child, I spent more than ten years learn the violin．Therefore, I couldn't understand "real music"．After I? graduated at high school, a friend of mine suggested that we started to learn the guitar because we all thought it was cool．l will never forget the day on that we went to buy guitars in the guitar store． There I saw a guitar player playing the guitar, which I really enjoyed．He became my the first guitar teacher．It took me such a long time choose a guitar among several wonderful model．Now the guitar is the most importantly part of my life and I practice it every day.

Sarah came running in saying, "Look what l found. " Over the top of the paper I was reading I saw a long object that made me jump. It was a piece of snakeskin that had been shed （脱皮)  by one of our garden snakes.

'Isn't it beautiful?" said my wide-eyed 7~year-old daughter. I stared at the organic wrapper and thought to myself that it really was not that beautiful, but I did not want to disappoint Sarah.  Everything children see for the first time is elementary to their sense of beauty and creativity. They see only merit (忧点) and excellence in the world.

"Why does it do this?" Sarah asked. I like to teach my children that there is something else going on besides what they see in front of them. "Snakes shed their skin because they need to renew themselves," I explained.

"Why do they need to renew themselves?" Sarah asked. "We often need to shed our skins, those coatings that we cover ourselves with," I said to my now absorbed daughter. "We outgrow some things and find other stuff unnecessary. This snake no longer needs this skin.  It is probably too old, and the snake probably doesn't think it looks as smart in the skin as it once did.  Like buying a new suit. "

Of course, I'm sure this explanation won't suit naturalists. But Sarah got the point. As we talked, I knew that she began to understand that renewal is part of progress; that we need to take a good look at ourselves, and rooms and schoolwork and creativity, and she began to see what we need to keep and what need to cast off.  I was careful to point out that this is a natural process, not one to be forced.

"Snakes don't peel off their skin when they feel like it," I explained.  "lt happens as part of their growth. "

"I see, Dad. " said Sarah.  She then jumped off my lap, grabbed the snakeskin, and ran off.

I hoped she would remember this. Often, in order to find our real selves underneath the layers of community and culture we are cloaked (掩饰) in year after year, we need to start examining these layers. We need to gently peel some away, as we recognize them to be worthless, unnecessary, or flawed (有缺陷的);  or at best,  remember the things we discard（丢掉）to teach us how we can improve.

1.When Sarah asked the author whether the snakeskin was beautiful,___________

A．he was shocked and jumped

B．he tried to understand her point of view

C．he thought that telling the truth was a merit

D．he decided to teach her something about the garden

2.How did Sarah feel about the author's explanation?

A．Confused.         B．Boreci            C．Satisfied.          D．Excited.

3.Which of the following would the author agree with?

A．By reflecting on ourselves, we can better ourselves.

B．It is necessary to force others to remove some things.

C．The community and culture force us to change.

D．It is natural to keep some old clothes.

4.From the text, we can conclude that the author___________.

A．does not like nature much

B．takes the chilcl's feelings lightly

C．is both a logical and thoughtful person

D．loves to see his daughter excited about animals

5.Which of the following could be the best title for the article?

A．The things we should cast off              B．A shed snakeskin in Sarah's eyes

C．A natural part of our growth               D．Renewal for snakes and us

Sarah came running in saying, "Look what l found. " Over the top of the paper I was reading I saw a long object that made me jump. It was a piece of snakeskin that had been shed （脱皮)  by one of our garden snakes.
'Isn't it beautiful?" said my wide-eyed 7~year-old daughter. I stared at the organic wrapper and thought to myself that it really was not that beautiful, but I did not want to disappoint Sarah.  Everything children see for the first time is elementary to their sense of beauty and creativity. They see only merit (忧点) and excellence in the world.
"Why does it do this?" Sarah asked. I like to teach my children that there is something else going on besides what they see in front of them. "Snakes shed their skin because they need to renew themselves," I explained.
"Why do they need to renew themselves?" Sarah asked. "We often need to shed our skins, those coatings that we cover ourselves with," I said to my now absorbed daughter. "We outgrow some things and find other stuff unnecessary. This snake no longer needs this skin.  It is probably too old, and the snake probably doesn't think it looks as smart in the skin as it once did.  Like buying a new suit. "
Of course, I'm sure this explanation won't suit naturalists. But Sarah got the point. As we talked, I knew that she began to understand that renewal is part of progress; that we need to take a good look at ourselves, and rooms and schoolwork and creativity, and she began to see what we need to keep and what need to cast off.  I was careful to point out that this is a natural process, not one to be forced.
"Snakes don't peel off their skin when they feel like it," I explained.  "lt happens as part of their growth. "
"I see, Dad. " said Sarah.  She then jumped off my lap, grabbed the snakeskin, and ran off.
I hoped she would remember this. Often, in order to find our real selves underneath the layers of community and culture we are cloaked (掩饰) in year after year, we need to start examining these layers. We need to gently peel some away, as we recognize them to be worthless, unnecessary, or flawed (有缺陷的);  or at best,  remember the things we discard（丢掉）to teach us how we can improve.
【小题1】When Sarah asked the author whether the snakeskin was beautiful,___________