高中英语Unit7TheSeaPeriodone课时作业北师大版.docx

Unit 7The SeaPeriod OneWarmup & Lesson 1 The Spirit of Explorers.阅读理解AUnder the worlds oceans and seas lies an attracting world of lands that stretches hundreds of kilometers in every direction.In this world，without the sun，there are deep canyons (峡谷)，great plains，and towering ranges of mountains.And this underwater world covers 70 percent of the earths surface.The worlds longest mountain range extends 16,000 kilometers under the Atlantic Ocean from Iceland to the Antarctic.Called the MidAtlantic Ridge (山脊)，this range of mountains contains a number of high peaks，among them are the Ascension Island，the Azores，and Iceland.The worlds highest mountain is found in the midPacific area.It is the Hawaiian volcano Mauna Kea，which is 9,450 meters from base to peak.This is nearly 610 meters taller than Mount Everest.Only 4,221 meters of Mauna Kea rises above the surface of the sea.In 1873 the British survey ship Challenger discovered the deepest trench (海沟) in all the seas.Named the Challenger Deep，it is near the island of Guam and is 11 kilometers deep.Since sunlight only reaches to a depth of about 244 meters，many of the creatures of the deep sea live in a world of darkness.However，to get help in their survival，many have their own bright lighting system.Food comes to them from the upper levels of the ocean and they can get a constant supply from the waste matter that gradually moves downward toward the ocean floor.These undersea creatures must remain at the various places for which they are fit.To wander to other levels could result in death from improper water pressure.1The best title for this text should be .AThe Sunless WorldBThe Longest MountainCThe Highest MountainDThe Deepest Trench答案A解析主旨大意题。通读全文可以看出，这篇文章主要讲述的是黑暗的海底世界的一些情况。2The worlds longest mountain range under the ocean .Aextends 1,600 kilometers under the Atlantic OceanBis called the MidAtlantic RidgeCcontains few high peaksDextends from Iceland to the Azores答案B解析细节理解题。由第二段可得出本题的答案。3From this passage we know that .Athe longest and the highest mountains lie in the seaBthe highest mountain lies on landCthe longest mountain lies on landDMauna Kea is 4,221 meters high答案A解析细节理解题。由第二、三段我们知道，最长的山脉在大西洋，最高的山峰则在太平洋中部的夏威夷。据此，我们可得出本题的答案。4If a kind of creature lives in an sea area about 300 meters from the surface， .Athe creature wont have enough food to eatBthe creature will feel very coldCthe creature will have to give light by itselfDthe creature will feel too hot答案C解析推理判断题。从最后一段我们知道，阳光只能到达离海面244米的地方，在此以下的地方生活的动物就必须靠自己的发光系统照明。BAs a seal rests on ice floating on the Antarctic Ocean，it should feel safe.But it is about to become a victim of a group of killer whales who have developed a great skill to catch seals.The killer whales work together as a group to create large waves that wash seals off the ice.Scientists who have discovered the technique，which has only been seen in killer whales hunting in the pack ice of the Antarctic，say it is so effective that it produces a meal for the whales three out of every four times they use it.Dr.Robert Pitman，a marine scientist at the National Oceanic and Atmospheric Administration in California，said，“The killer whales were very good at knowing in advance if they were going to be able to wash a seal off a piece of ice and they were always successful in getting the seal into the water.Sometimes the seal was washed off but managed to flee.However，it was not very often.”Dr.Pitman and his colleague Dr.John Durban helped BBC capture the wavewashing behaviour on camera.By swimming in formation(队列) towards the ice from as far away as 150 feet，the whales created a bow wave in front of their bodies.When they reached the block of ice where the seal was hiding，they dove under the ice，kicking their tails in a powerful stroke(击) to create a large wave that washed over the ice and knocked the seal into the water where they could grab it and drown it.Research has shown that there are at least four types of killer whales living in the Antarctic，all of which have different colour patterns and hunting behaviour，and eat different things.The largest killer whale hunts minke whales in open water while the ice killer whales mainly hunt seals.A third type of killer whale mainly preys on penguins and the fourth dives deep to hunt fish.5According to Paragraph 1，killer whales hunt a seal on a piece of ice by .Apushing the ice onto the groundBknocking hard on the ice togetherCcreating large waves to wash it off the iceDfollowing it all the time until it swims in the sea答案C解析细节理解题。根据第一段最后一句“The killer whales work together as a group to create large waves that wash seals off the ice.”可知这种鲸鱼通过制造大浪把海豹从冰上冲刷下来，然后捕食它们。6It is implied in the passage that .Akiller whales often stay hungryBkiller whales usually hunt aloneCcompetition among killer whales is very fierceDkiller whales are very good at hunting seals at sea答案D解析推理判断题。根据第二段的“.it is so effective that it produces a meal for the whales three out of every four times they use it.”以及第三段的“.they were always successful in getting the seal into the water.”可推断这种鲸鱼很擅长捕食海豹。7What does the underlined word “flee” in Paragraph 3 most probably mean?AMove. BEscape.CStruggle. DFight.答案B解析词义猜测题。根据but的语境可知，有时候海豹也会成功地“逃脱”。8What is Paragraph 4 mainly about?AHow Dr.Pitman and his colleague work.BHow killer whales find seals.CHow killer whales hunt seals.DHow killer whales eat a seal.答案C解析段落大意题。通读第四段可知，主要是通过镜头来告诉我们这种鲸鱼是如何成功猎捕海豹的。.完形填空In 1971 a young man who grew up very poor was travelling across the country，trying to make a new start for himself.Along the way he had completely run out of 1 and was forced to spend the night in his car.This 2 until one morning，after a week of sleeping in his car，he walked 3 into a restaurant and ordered a big breakfast.After eating his first good meal in 4 ，he found himself 5 to the waiter，telling him he had lost his 6 .The waiter，who was also the owner，walked 7 the chair where the young man had been sitting.He bent down， 8 a $ 20 bill that looked 9 it had fallen on the floor and said，“Son，you must have 10 this.” The young man couldnt believe his 11 ！He quickly paid for the breakfast，left a 12 ，bought gas with the change，and headed West.On the way out of town，he began to understand 13 the fellow did.Maybe nobody dropped the money 14 .“Maybe that fellow just knew I was 15 and he helped me in a way that didnt embarrass(使困窘) me.So I just made a 16 to help others if I can.”Later，he worked very hard and became a(n) 17 man.Now，he lives near Kansas City.Each year he 18 thousands of dollars.He is known as the “Secret Santa” because at 19 time each year，he personally hands money out to those on the streets and at 20 .Last year，he gave more than $50,000 away in Kansas City. 1A.time BgasCenergy Dmoney答案D解析从下文的“.was forced to spend the night in his car.”以及第二段的内容可知，年轻人在路上花光了所有的钱。2A.continued BremainedCkept Dstayed答案A解析这种情况一直持续到一天上午。continue持续，继续，符合句意。remain余下，保持，仍是；keep为及物动词或系动词，不单独使用；stay呆在原处，主语是人或有生命的物，均不合句意。3A.hopefully BexcitedlyCnervously Dsilently答案C解析由于口袋里没有钱，所以年轻人进餐馆吃饭感到紧张。4A.hours BweeksCyears Dmonths答案B解析上文提到年轻人在路上花光了钱并在车里睡了一周的时间，与之能对应的只能是数周以来他所吃过的第一顿好饭。5A.turning BlyingCsmiling Djoking答案B解析自己没有钱却说是丢了钱包，故年轻人是在说谎。6A.way BjobCwallet Dcar答案C解析从下文可以看出，年轻人说谎称自己丢失了钱包。7A.behind BnearCbefore Dunder答案A解析根据常识可知，如果掉在椅子前面很容易被主人发现。故这里说“服务员走到刚才年轻人所坐的椅子后面”。8A.took out Bpicked outCtook up Dpicked up答案D解析服务员弯腰把钱从地上捡起来。pick up拾起，捡起；take out拿出；pick out挑选；take up从事，占据，继续。9A.even if Bas ifCas well Deven so答案B解析那张20美元的票子好像是掉在地板上似的。as if好像；even if即使；as well也；even so即便如此。10A.placed BputCdropped Dremoved答案C解析与上句的“.it had fallen on the floor.”相照应，那钱肯定是掉了的钱。11A.luck BwordCpromise Daction答案A解析从上文提到年轻人身无分文地走进这家餐馆吃饭，正苦于没钱付账时，人家却认为这20