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1、Unit 3 Under the sea .阅读理解A体裁：说明文话题：海洋词数：318时间：7The sea is home to billions of plants and animals.Many live only near the sunlit surface.Oceanographers classify marine living beings by separating them into two main groups：plants and animals.There are two general types of plants found in the ocean，th
2、ose having roots that are attached to the ocean bottom and those not having roots which simply drift about with the water.The rooted plants in the ocean are only found in shallow water because there is not enough sunlight to sustain photosynthesis(光合作用) in deeper waters.Since sunlight does not pass
3、more than a few hundred feet into the ocean，most of the ocean is not capable of supporting rooted plants.The most plenty plants in the ocean are known as phytoplankton(浮游生物)These are usually singlecelled，minute floating plants that drift throughout the surface waters of the ocean.To grow，phytoplankt
4、on need nutrients from the sea water and lots of sunlight.Marine animals are divided into three groups：zooplankton，nekton，and benthos.Zooplankton are drifting animals and are usually small，however，they can grow to fairly large size.For example，the jellyfish and the Portuguese manofwar are examples o
5、f larger types of zooplankton which are unable to propel(推进) themselves effectively.Nekton are the free swimmers and probably the largest portion of familiar animals found in the ocean belong to this class.Common fishes，the octopus，whales，eels and squid are all examples of nekton.The third type of s
6、ea animals spends its entire life on or in the ocean bottom.This group of marine animals is called the benthos.Some of these creatures，such as lobsters and snails，may be able to move about on the bottom but their lifestyle is so bound up with the ocean floor that they are unable to survive away from
7、 this environment.【语篇解读】海洋是成千上万种动物和植物的家乡。海洋植物主要有两种：有根植物和浮游植物；海洋动物大体可分为三类：浮游动物、游泳动物和海底动物。1The text mainly tells us something about _Amarine plants and marine animalsBtwo types of sea plantsCthree kinds of sea animalsDsmall and big animals in the ocean答案A主旨大意题。本文主要讲述了海洋生物的分类(海洋植物和海洋动物)以及他们的特点。2Why can
8、t we find the rooted plants in deep water of the ocean?ABecause there are too many rocks at the bottom of the ocean.BBecause the rooted plants cant stand the coldness of the ocean.CBecause there is not enough sunlight for them in deep water.DBecause the rooted plants need more sunlight than plants w
9、hich have no roots.答案C细节理解题。根据第二段可知，有根植物不能生存在很深的海底是因为那儿没有充足的阳光来进行光合作用。3One of the characteristics of zooplankton is that _Athey are small and never grow to large sizeBsome of the zooplankton cant swim effectivelyCthey can swim freely in deep water of the oceanDthey need more sunlight than other anim
10、als in the ocean答案B细节理解题。根据第四段最后一句可知，有些zooplankton不能自己有效地推进自己，也就是说它们不能有效地游泳。4According to the last paragraph，we can conclude that _Abenthos live on the surface of the ocean waterBsome of the benthos cant live without the ocean floorCbenthos spend most of their time swimming in the oceanDbenthos can
11、move about in the middle of the sea water答案B细节理解题。根据短文最后一句可知benthos离开海底不能生存。B体裁：记叙文话题：人物与事件词数：294时间：6A man once telephoned Vincent Peale，a famous psychologist(心理学家)He was very sad and in low spirits and told the Vincent Peale that he had nothing left to live for.Peale invited the man over to his off
12、ice.“Everything is gone，and I feel hopeless，” the man told him.“Im living in deepest darkness.In fact，Ive lost heart for my life.” Vincent Peale smiled sympathetically (同情地)“Lets take a look at your situation，” he said calmly.On a piece of paper he drew a straight line down the middle.He suggested t
13、hat they list on the left side the things the man had lost，and on the right，the things he had left.“You dont need that column (栏) on the right side，” said the man sadly.“I have nothing left.” Peale asked，“When did your wife leave you？” “What do you mean？” the man asked，“She hasnt left me.My wife lov
14、es me！” “Thats great！” said Peale.“Then that will be number one in the right columnWife hasnt left.Now，when were your children put into prison？” “Thats a silly question.My children arent in prison！” “Good! Thats number two in the right columnChildren are not in prison，” said Peale，writing it down.Af
15、ter a few more questions in the same column，the man finally got the point and smiled in spite of himself (不由自主地)“Things will change when you think of them in another way，” he said.Change your thoughts and you will change your world.If you paint in your mind a picture of bright and happy expectations，you will put yourself into a condition helpful to your goal.【语篇解读】改变思维就会改变你的世界。心中充满美好的期待，你就会实现自己的目标。5Why did the man feel he was in deepest darkness?ABecause his wife had quarreled with him and left.BBecause his children were put into in prison.CBecause he had lost everything in his
