14．If you look at the sky one night and see something moving and shining that you have never seen before，it might be a comet （彗星）． A comet sometimes looks like a star．Like a planet，a comet has no light of its own．It shines from the sunlight it reflects （反射）．Like the earth，a comet goes round the sun，but on a much longer path （轨道） than the earth travels． If a comet isn't a star，what is it then？ Some scientists think mat a large part of a comet is water frozen into pieces of ice and mixed with iron and rock dust and perhaps a few big pieces of rock．When sunshine melts（融化） the ice in the comet，great clouds of gas go trailing after it．These clouds，together with the dust，form a long tail． Many people perhaps have seen a comet．However no one knows how many comets there are．There may be millions of comets，but only a few come close enough for us to see． An Englishman named Edmund Halley，who lived from 1656to 1742，found out a lot about the paths that comets take through the sky．Some comets move out of our sight and never come back．Others keep coming back at regular times．A big comet that keeps coming back was named after Halley because he was the one who worked out when it would come back again．Maybe you have ever seen Halley's Comets because the last time it came close to the sun and the earth was in the year 1986．Then people all over the world were outside at night to look at it．You will probably be able to see Halley's Comets when it comes near the earth again．
62．A comet is likeD． A．sun B．moon C．sunlight D．the earth 63．Maybe many peopleD． A．haven't seen any comets B．have seen all comets C，have seen a comet at daytime D．have seen a comet 64．Some comets keep coming backC． A．at any time B．at noon C．at regular times D．at daytime 65．Halley's Comets came backC． A．in 1990 B．in 1980 C．in 1986 D．in 1989．
14．Do you know when and how the International Committee of the Red Cross （ICRC） started？ In 1859，during the war time，a Swiss man named Henry Dunant passed a town in Italy where many soldiers（战士） had been wounded （受伤）．Dunant thought they should be cared for．A Swiss organization used his idea in 1863．When the organization became international，it was named the International Committee of the Red Cross． ICRC's emblem is a red cross on a white ground．People use it as a sign for army （陆军，军队） doctors．There are ICRC offices in many countries around the world now.12，000ICRC workers are helping people in more than 80countries． In China，there is an organization named the China Red Cross Society （CRCS）．It is part of ICRC．It started in 1904． Most of the people in CRCS are full-time workers or volunteers．CRCS also has organizations in many schools．Student members learn to look after the elderly and to help the weak．They are also taught to give medical care to people who are in danger．
56．When did the International Committee of the Red Cross start？D A．In 1559． B．In 1904． C．In 1859． D．In 1863． 57．How many ICRC workers are helping people around the world now？A A.12，000． B.21，000． C.90． D.60． 58．What is the full name of CRCS？D A．The International Committee of the Red Cross． B．The Chinese Committee Society． C．The Chinese Red Cross Society． D．The China Red Cross Society． 59．What does the word"emblem"mean in Chinese？C A．号码 B．图片 C．标志 D．颜色 60．Why are there student members in CRCS？D A．Because they learn to look after the elderly． B．Because they help the weak． C．Because they give medical care to people who are in danger． D．Because CRCS has organizations in many schools．
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