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看图完成对话.
A: How does Jean g 1 to school?
B: She u 2 takes a bike, but sometimes she t 3 the subway.
A: How long 4 it take her?
B: It takes 25 minutes by 5 and 5 minutes 6 subway.
A: Why does she sometimes take the subway?
B: B 7 sometimes it r 8 __
A: How f 9 is her school from her home?
B: Not far, it's only about 6 k 10 .
查看习题详情和答案>>看图完成对话.
A: How does Jean g 1 to school?
B: She u 2 takes a bike, but sometimes she t 3 the subway.
A: How long 4 it take her?
B: It takes 25 minutes by 5 and 5 minutes 6 subway.
A: Why does she sometimes take the subway?
B: B 7 sometimes it r 8 __
A: How f 9 is her school from her home?
B: Not far, it's only about 6 k 10 .
查看习题详情和答案>>| 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 |
根据首字母完成短文
We live in the “computer a 【小题1】 ”. People, such as scientists, teachers, writers and students, use computers to do all k 【小题2】 of work. But more than 30 years ago, computers couldn’t do m 【小题3】 . They were very big and expensive. Few people were i 【小题4】 in them or knew how to use them. Today computers are smaller and c 【小题5】 . Since they can do lots of work, many people like to use them. Some people even have them at home. Computers became very important, because they can work faster than men and make f 【小题6】 mistakes. They can help people do a lot of things. W 【小题7】 now use computers to write, teachers use them to help teaching, students use them to help study, and children use them to play g 【小题8】 . Computers are very u 【小题9】 and helpful. They are our good friends. Do you want to o 【小题10】 a computer?