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| 阅读理解。 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| David's got a text message from his friend Sam. Can you understand it? 7,15 20,15 20,8,5 16,1,18,11 This message was in code (密码, 代码). How many letters are there in the English alphabet? Twenty-six. So can you read it now?
B instead of C, and so on. His message to Sam shown on the right was very short. Can you understand?
she felt puzzled. She couldn't read it at all. But David was very happy that his sister couldn't read his message! Lots of people use codes to send secret messages. In a war, secrets are very important so soldiers often send each other messages in code. Nowadays, we can use computers to make and break difficult codes. Even before computers, people invented other machines to do this. Here's a famous machine that Germans used in the Second World War (1941-1945). It's called the Enigma Machine. The machines were very big, heavy and expensive. Every day they changed the codes automatically, and this made it almost impossible for anyone to break the codes. The person sending a message had one machine, and the person receiving the message had another. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1．Sam asked David to go to the ______. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| A．park B．house C．museum D．zoo | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 2．Sam told David to meet him ______. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| A．before breakfast B．after school C．after dinner D．before school | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3．Codes are used to keep something ______. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| A．new B．old C．secret D．known | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 4．People will never know the meaning if they can't ______ the code. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| A．break B．make C．change D．write | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 5．The best title of this passage is . | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| A．English Letters B．Codes C．Messages D．Machines |
2. He offered __________ (help) us.
3. There are still some trees __________ (plant)
4. __________ (read) the instructions before you use the machine is necessary.
5. Don't you hear him __________ (sing) next door?
6. Have you seen a wallet __________ (lie) on the ground?
7. __________ (not know) his telephone number, I couldn't ring him up.
8. This is a book __________ (write) by Lu Xun.
9. Would you mind my__________ (open) the door?
10. My TV set needs __________ (mend).
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writer. But before he was famous, even his neighbours didn't know him well.
One day Mark Twain went to borrow a certain book from a neighbor in Tarry town.
"May I borrow a book from you?" he asked politely."Yes." the neighbor told him," but I must ask you to
read it here. You know I never let anybody take my book out of my study (书房)."
Some days later the neighbor wished to borrow Mark Twain's machine for cutting grass in the garden.
"May I borrow your machine to cut the grass in my garden?" the neighbor asked with a smile on his face.
"Certainly." Mark Twain told him,"but I must ask you to use it here. You know that I never let anybody take
my machine out of my garden."
B. America
C. Japan
D. France
B. his neighbor didn't like him
C. he never met Mark Twain
D. Mark Twain didn't pay money for the book
B. The machine.
C. Mark Twain.
D. Neighbor.
B. To cut the grass.
C. To cut trees.
D. To cut his hair.
B. his neighbor wasn't friendly to him
C. his neighbor didn't give him money
D. his neighbor was a thief
根据所给句子的句意和音标，选择正确的单词
1. My favorite subject is ____________. / a:t/
A．ask B．art C．at D．any
2. My sister wants to be a ___________ / bæŋk / clerk after she graduates.
A．back B．band C．bank D．beat
3. Wang Meng is the ____________ / 'kæptin /of the woman skating team. She won three gold medals in the Olympic Games.
A．cabbage B．champion C．camare D．captain
4. I think the sports shoes are too ____________ / iks'pensiv /for me to afford.
A．expensive B．exercise C．explain D．exchange
5. Please read the ___________/ in'strʌkʃən /carefully before you use the new washing machine.
A．international B．influence C．instead D．instruction
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