摘要：D A few days ago ,few people knew his name or his face .But last Thursday ,when he came back to the earth after a 21-hour trip to space. Yang Liwei’s smile was seen across the world. The 38-year-old astronaut was sent into space at 9:00 a.m. last Wednesday by China’s Shenzhou V Spaceship ,and it traveled round the earth 14 times .He landed safely at 6:23 a.m., the next day .That made China the third country to successfully send a person into space, after the former Soviet Union and the USA. Yang was pleased with his job．“I have seen many landing scenes ever before on video tapes , and I think ours was one of the most successful , he said on a special plane to Beijing after landing . Anybody who saw the breaking-up of the US space plane named Columbia in February of 2003 knew that Yang was in great danger . Yang experienced very high temperature , while the gravitational forces on taking off and landing was strong enough to make tears from his eyes. He has spent five years training to become a spaceman after 1350 hours’ flying in the air. Although it was hard work . Yang loved it .Yang’s success was well worth all the hard work.. Yang has become China’s first spaceman. 根据短文内容补全句子 16．Shenzhou V spaceship spent traveling round the earth at a time . 17．There are three countries , the former Soviet Union ,the United States and China ,which sent spaceships with up into successfully. 18．Before his own landing, Yang Liwei on video tapes. 19．Yang Liwei was very clear that he was when the spaceship took off or . 20．While the spaceship takes off from the earth ,the astronaut has to experience .

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