There’s nothing to do , so I        as well go to bed .

       A．must                  B．should                C．may                   D．need

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 ________.

阅读下面短文，掌握其大意，然后从41─60各题所给的四个选项（A、B、C和D）中选出最佳选项，并在答题卡上将该项涂黑。
“Father, I don’t like to go to school,” said Harry Williams one morning. “I wish you would let me stay at home. Charles Parker’s father doesn’t make him go to school.”
Mr Williams  36 his little boy by the hand, and said   37  to him, “Come, my son. I want to show you  38  in the garden.”
Harry walked into the garden with his   39  , who led him along until they came to a bed in which peas(豌豆) were growing. Not a weed(杂草) was to be  40  about their roots.
“See how beautifully these peas are   41, my son,” said Mr. Williams. “How clean and healthy the vines(藤) look. We shall have a good   42 . Now let me show you the vines in Mr. Parker’s garden.”
Mr. Williams then  43 Harry to look at Mr. Parker’s pea vines.
After a few moments, Mr. Williams asked, “Well, my son, what do you   44 Mr. Parker’s pea vines?”
“Oh, Father!” replied the little boy. “I never saw such  45 looking peas in my life! The weeds are nearly as  46 as the peas themselves. There won’t be half a crop!”
“  47  are they so much worse than ours, Harry?”
“Because they have been left to grow as they  48 . I suppose Mr. Parker just planted them, and never took any care of them  49 ”
“ Yes. A garden will soon be overrun with weeds  50  it is not taken good care of,” Mr. Williams  51 , “and so it is with the human garden. Children’s minds are like garden beds. They must be  52  cared for. I send you to school in order that the garden of your  53  may have good seeds(种子) and   54 plentifully. Now which would you  55 , to stay at home or go to school?”
“I would rather go to school,” said Harry.

阅读下面短文，掌握其大意，然后从41─60各题所给的四个选项（A、B、C和D）中选出最佳选项，并在答题卡上将该项涂黑。

“Father, I don’t like to go to school,” said Harry Williams one morning. “I wish you would let me stay at home. Charles Parker’s father doesn’t make him go to school.”

Mr Williams  36 his little boy by the hand, and said   37  to him, “Come, my son. I want to show you  38  in the garden.”

Harry walked into the garden with his   39  , who led him along until they came to a bed in which peas(豌豆) were growing. Not a weed(杂草) was to be  40  about their roots.

“See how beautifully these peas are   41, my son,” said Mr. Williams. “How clean and healthy the vines(藤) look. We shall have a good   42 . Now let me show you the vines in Mr. Parker’s garden.”

Mr. Williams then  43 Harry to look at Mr. Parker’s pea vines.

After a few moments, Mr. Williams asked, “Well, my son, what do you   44 Mr. Parker’s pea vines?”

“Oh, Father!” replied the little boy. “I never saw such  45 looking peas in my life! The weeds are nearly as  46 as the peas themselves. There won’t be half a crop!”

“  47  are they so much worse than ours, Harry?”

“Because they have been left to grow as they  48 . I suppose Mr. Parker just planted them, and never took any care of them  49 ”

“ Yes. A garden will soon be overrun with weeds  50  it is not taken good care of,” Mr. Williams  51 , “and so it is with the human garden. Children’s minds are like garden beds. They must be  52  cared for. I send you to school in order that the garden of your  53  may have good seeds(种子) and   54 plentifully. Now which would you  55 , to stay at home or go to school?”

“I would rather go to school,” said Harry.