2019-2020年高一人教版英語必修二課時作業(yè)：Unit4Wildlifeprotection（6）含答案.doc

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2019-2020年高一人教版英語必修二課時作業(yè)：Unit4Wildlifeprotection（6）含答案 一、用準確的介詞或副詞填空 Many of the animals have died______ _______a result _______the enemies that kill and eat them 2．Wildlife is ______danger _______disappearing，which we should be concerned_______． 3．There was an antelope ________his eyes fixed _______her． 4．A dog suddenly came out _______the bed． 5．________now________，we should pay more attention ______wildlife protection． 二、完形填空 The world is __1___hungry，it is also thirsty for water．This may seem ___2___to you，for nearly 70 percent of the earth’S surface(表面)is covered with water．B ut about 97 percent of this huge __3___is seawater，___4___salt water．Man can only drink and use ___5__3 percent the fresh water that es from rivers，lakes，underground，and other sources(來源)．And we can’t even use all of__6___，because some of it is in the ___7___of icebergs and glaciers(冰川)．Even worse, some of it has been polluted(污染)．__8___，as things stand today，this small amount of water，which ___9___by rainfall，is still enough for US．But our need for water is increasing rapidly almost __10___．Only if we take steps can we solve this problem now ___11___ aserious worldwide water shortage in the future． One of the first steps we should take is to develop ways of ___12___ water．Today，in most large cities，water is used ___13___ and then sent into a sewer system(下水道系統(tǒng))．From there it goes to the sea or run into underground storage tank(蓄水池)．But it is __14__ _to pipe water that has been used to a purifying plant(凈化廠)．There it can be filtered(過濾)and treated with chemicals SO that it can be used again. ___15__ way is to make use of sea water by removing (去除)the salt．This is called desalinization(脫鹽)and it is already in use in many parts of the world． ( )1．A．either B．neither C．not only D．too ( )2．A．new B．strange C．exciting D．puzzling ( )3．A．number B．deal C．quantity D．amount ( )4．A．or B．as C．for D．with ( )5．A．another B．the other C．other D．every ( )6．A．it B．them C．that D．this ( )7．A．form B．type C．shape D．kind ( )8．A．But B．Therefore C．Yet D．However ( )9．A．is constantly being replaced B．has already been replaced C．was formally replaced D．replaced ( )10．A．day after day B．day in and day out C．by day D．day by day ( )11．A．to deal with B．to work out C．to answer D．settle ( )12．A．reused B．used C．reusing D．using ( )13．A．only once B．again and again C．once more D．many times ( )1 4．A．necessary B．possible C．impossible D．important ( )15．A．The other B．Another C．Some D．A certain 三、閱讀理解 During the 1 9th century，scientists found that when certain parts of a person’s brain were injured，he would lose the power to do certain things．And so，people thought that each part of the brain does a different job．But modern research has discovered that this is not so，for it is not easy to show exactly what each part of the brain does． In the past fifty years there has been a great increase in the amount of research done on the brain．Scientists have found out that the way the brain work is not so simple as people in general may think．Chemists tell us that about 1 00 000 chemical changes take place in the brain every second．Some recent researches also suggest that we can remember everything that happens to us．We may not be able to think of the things we have heard and seen，but it is all kept there in the storehouse of the human mind． Earlier scientists thought that the power of one’s brain got weaker and weaker as one grew older．But it is now thought that that’s not true．As long as the brain is given plenty of exercise， it keeps its power．It has been proved that an old person who has always been active in the mind has a quicker mind than a young person who has only done physical work without using much of his brain． ( )1．In the last century，scientists found that a person would lose the power to do certain things————． A．when he had drunk too much B．if certain parts of his brain were hurt C．after he did a quite different job D．if he had been greatly frightened ( )2．Scientists today are still unable to show exactly——． A．how many chemical changes take place in the brain each second B．whether each part of the brain does the same work C．what each part of the brain is doing ． D．which part of the brain is the most important ( )3．It has been found that the brain usually works ． A．in a fairly plicated(復雜)way B．a little now and a little then C．without any rest all day long D．in a very simple way ( )4．Which of the following is not true“——． A．Scientists are working hard to solve(解決)the mysteries of the brain B．As many as six million changes take place in the brain every minute C．A young man doing physical labor is sure to have a much slower mind D．Even an old man may have a quick mind only if his brain is given much exercise ( )5．The more work our brains have，——． A．the less result we will gain B．the more tired they will feel C．the weaker their power will get D．the more work they are able to do keys: 一、用準確的介詞或副詞填空 1．out as of 2．in of about 3．with on，upon 4．from under 5．From on to 二、完形填空 1．C 2．B 3．D 4．A 5．B 6．A 7．A 8．D 9．A 10．D 11．A 12．C 13：A 14．A 15．B 三、閱讀理解 1．B 2．C 3．A 4．C 5．D