Why do you forget things sometimes？ There are several reasons. An important reason for forgetting something is that you did learn it well in the beginning. For example， you meet some new people， and soon you forget their names. You hear the names but you do not learn them， so you forget them.

　　You can help yourself remember better. Move information from your short-term memory to your long-term memory. You can do this if you practise the new information for more times.

　　46. According to the passage， you forget the telephone number that you don’t call often because________.

　　A. the telephone number is too long

　　B. the telephone number is very strange

　　C. you use your short-term memory to remember it

　　D. you look it up in the telephone book

　　47. Which is easier to forget？

　　A. Something that you understand

　　B. Your best friend’s name

　　C. The new information that you have practiced a lot

　　D. Something that you didn’t learn well in the beginning

　　48. According to the passage， a person’s short-term memory lasts about_________.

　　A. half a second              B. half a minute

　　C. half a hour                D. half a day

　　49. According to the passage， what is helpful for you to remember better？

　　A. Use your short-term memory to learn things

　　B. Move information from your short-term memory to your long-term memory

　　C. Look something up often

　　D. Learn something well in the end

　　50. The writer mainly wants to well us some ideas on ________.

　　A. how to keep something in mind long

　　B. how to learn English well

　　C. how to make a telephone call

　　D. how to remember a person’s name

　　( C )

　　A few days ago， few people know his name or recognized his face. But last Thursday， when he came back of the earth after a 21-hour trip to space， Yang liwei’s smile was seen across the world

　　The 38-year-old astronaut (宇航員)  was sent into space at 9 a.m. last Wednesday by China’s Shenzhou V spaceship， which traveled round the earth 14 times. He landed safely at 6：23 a.m. the next day， making China the third country to successfully send a person into space， after the former Soviet Union (蘇聯(lián)) and US.

　　Yang was pleased with his job. “I have seen many landing scenes before on video， and I think ours was one of the most successful.” he said on a special plane to Beijing after landing.

　　Born into an ordinary family in Liaoning Province， he became a pilot (飛行員) in the Chinese Air Force in 1987， spending 1，350 hours in the air. He joined the Chinese space programme 11 years later. While in space， Yang recorded everything he saw as well as showing China’s national flag and the United Nations’ flag to the people watching on TV at home. He also ate a meal of diced chicken and fried rice， before taking a 3-hour nap. The whole programme went according to (按照) plan， but space exploration is not as it seems.

　　Anyone who saw the destruction (breaking) of the US space shuttle (航天飛機) Columbia in February this year will know that Yang took a great risk (danger). He experienced (經歷) very high temperature， while the gravitational forces (重力) on takeoff and landing were strong enough to force tears from his eyes.

　　He has spent five years training to become a spaceman.

　　“I eat all of my meals at the space programme’s dining-room and have never been able to take my son to school，” he said. “I’ve never met his teachers.”

　　But all the hard work was well worth it ----Yang has become China’s first spaceman.

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