1、课时作业(二)Unit 7The sea(本栏目内容，在学生用书中以独立形式分册装订！).完形填空“Trout (鳟鱼) are swirling (打旋)Trout are swirling！” Grandpa says.It means that the trout in the stream are_1_.They _2_round and round，looking for food.“Lets go _3_！” Grandpa says.He takes his lucky fishing cap and toolbox.I_4_the fishing poles.Some day
2、Im going to_5_a lucky fishing cap like Grandpas.To catch the swirling trout，Grandpa says we must wash our _6_with mud.I like doing that.I wipe my hands on my jeans，just like Grandpa.He_7_a deep pool of water in the stream.“Thats _8_the trout are swirling，” he whispers.On tiptoe，we quietly move towar
3、d the trout.We cover our hooks with bait (鱼饵) that _9_like cheese.Its not really cheese，_10_Grandpa says the trout wont know the _11_.We throw our hooks into the _12_for the swirling trout to bite.My nose itches (痒)，but I dont_13_touch it.I dont move an inch.I dont say a word.It might_14_the trout a
4、way.The tip of my pole _15_just a little.Maybe a swirling trout is eating the bait.Then my pole was pulled down suddenly.The trout is on my hook!Grandpa puts it into a net_16_it can swim away.He_17_it with a tape measure.Its fourteen inches！” he whispers.Im so excited that I almost forget to be_18_.
5、Grandpa looks at me and smiles.“_19_who catches a trout like that doesnt need a lucky cap，because good luck follows a man who waits for it_20_with patience.” he says，laughing.I hope hes right.语篇解读本文以生动活泼的文字讲述了祖父带我去钓鱼并教我如何钓鱼，我看到他戴着幸运的钓鱼帽，我也想要一顶，后来祖父告诉我并不需要幸运的钓鱼帽也可以钓到大鱼，因为幸运常常跟随着那些静静地耐心等待的人。1A.thirsty
6、BhungryCsleepy Dtired解析：这意味着小溪里的鳟鱼饿(hungry)了。根据They_round and round，looking for food.可知，它们是饿了。答案：B2A.walk BswimClook Deat解析：它们游(swim)来游去，正在寻找食物。答案：B3A.fishing BdancingCshopping Dboating解析：“我们去钓鱼(fish)吧！”祖父说。根据下文拿起钓鱼帽和鱼竿可知是去钓鱼。答案：A4A.prepare BrepairCcarry Ddecorate解析：我拿(carry)着钓鱼竿。答案：C5A.rent BsellCw
7、ash Dwear解析：有一天我要像祖父一样戴(wear)着一顶幸运的钓鱼帽。 答案：D6A.hands BfacesCfeet Dcaps解析：为了抓住打旋的鳟鱼，祖父说我们必须要用泥洗手(hand)。根据I wipe my hands on my jeans.可知应为hand。答案：A7A.runs after Bgets aroundCpoints to Dholds up解析：祖父指着(point to)小溪中的一个深水潭，悄悄地对我说：“那就是鳟鱼打旋的地方。”答案：C8. Awhat BwhenCwhich Dwhere解析：解析见上题。where引导表语从句，在从句中作地点状语。
8、答案：D9. Asmells BtastesCfeels Dsounds解析：我们把闻(smell)起来像奶酪的诱饵放在鱼钩上。 答案：A10A.so BbutCand Dbecause解析： 这不是真正的奶酪，但(but)祖父说鳟鱼不会发现这和真的奶酪有什么不同(difference)。答案：B11A.shape BdifferenceCprice Dquality答案：B12A.mud BboxCbattle Dstream解析： 我们把鱼钩放到溪流(stream)中来让打旋的鳟鱼咬钩。答案：D13A.need BwantCdare Dlike解析： 我的鼻子很痒，但我不敢(dare)去碰
9、它。答案：C14A.scare BforbidCattack Dbury解析：这可能会把鳟鱼吓(scare)跑。答案：A15A.floats BchangesCshakes Dreacts解析：鱼竿的前端抖动(shake)了一下。答案：C16A.until BbeforeCunless Dafter解析：祖父把它放到网中以防止它会游跑。until到为止；unless除非；after在之后。此处意为在鳟鱼能游跑之前就把它放进了网中。答案：B17A.draws BfeedsCcatches Dmeasures解析：他用卷尺量(measure)了一下鳟鱼的长度。答案：D18. Anoisy Bbra
10、veCquiet Dactive解析：我非常激动以至于几乎忘记了保持安静(quiet)。答案：C19A.Everyone BSomeoneCNobody DAnyone解析：任何人(anyone)都可以抓住这样大的鳟鱼，即便他没有幸运的钓鱼帽，因为好运会跟随着静静地(silently)耐心等待它的人。答案：D20A.alone BsilentlyCcarefully Dcuriously答案：B.阅读理解AThe early bird really does catch the worm.but it saves it for dinner.Blue tits，great tits and o
11、ther small garden birds look for food in the morning but only return to eat it in the late afternoon，a study has found.Oxford University researchers believe the strategy allows them to stock up on food while avoiding being caught by predators (捕食者)A full belly in the morning would slow them down in
12、the hunt for food and make them easy prey.They search for food when lean and lithe and then dine in the evening to ensure they have a big enough store of fat to survive through the night.The early bird strategy was revealed in an experiment in which over 2,000 birds were fitted with tiny radio tags
13、which activated when they landed on feeders hidden in Wytham Woods，near Oxford.The feeders were moved around over the course of the day and the researchers noted when the birds landed on them.This revealed that the birds were much better at finding the feeders new locations in the morning.The resear
14、chers said the complex strategy acts as an insurance policy.It is particularly important in winter when the risks of predation are high and just one day without food can make the difference between life and death for small birds.Zoologist，Damien Farine，said：“Birds have to store body fat to avoid sta
15、rving during the cold winter nights，but this can make them slower and heavier，so they are more likely to be caught by predators.”“So there is a tradeoff，where birds need to remain lean enough in order to outrun their predators during the day，but also store enough fat to survive each night.” “Our res
16、ults show these birds display very different patterns of food discovery in the morning and afternoon；very few new food sources were found during the afternoon，whereas nearly every new food source we put out during the morning was quickly discovered.” “It supports the idea of an early bird strategy o
17、f looking for food early on so they can return to feast a couple of hours before dusk in preparation for a long winters night.”语篇解读俗话说早起的鸟儿有虫吃，科学家们发现一些早起的小鸟是在早上的时候收集食物，却是在晚上的时候才开始享用食物。1What do little early birds do in the morning，according to the research?AOnly find the locations of worms.BSearch fo
18、r and store worms in their nests.CHave a full meal of worms.DFind where their enemies are.解析：细节理解题。根据第二、三段的内容可知早起的鸟儿只是在早上的时候寻找并储藏食物。答案：B2How do little birds behave in the afternoon in the experiment?AThey lose their appetite for worms.BThey can escape from predators more quickly.CThey are worse at f
19、inding the locations of feeders.DThey look for more food resources.解析：细节理解题。根据倒数第二段的内容可知实验结果显示在下午的时候这些小鸟只能找到少部分的食物来源，但是早上的时候却能很快地找到新的被放置的食物来源。答案：C3The eating habit of little birds is especially important_.Ain summer Bin springCin autumn Din winter解析：细节理解题。由第六段It is particularly important in winter.f
20、or small birds.可知D项正确。答案：D4What can we learn from the text?ALittle birds starve in the morning in order to eat more later.BThe eating habits of little birds can help them survive.CSlim little birds are less attractive to predators.DThe aim of the research was to help little birds.解析：推理判断题。根据第五段的内容可知
21、这种策略很重要，尤其是在冬天，是有关生死的抉择。 答案：BBAbout 97% of the worlds water is salty and is found in our oceans and seas.But，as we cant drink seawater，how can it be important?Every part of our seas and oceans contains an amazing number of animals and fish that live at different ocean depths.Most of the different sp
22、ecies of animals and fish depend on simple plants for their food.These simple plants called algae (海藻) drift near the surface of the ocean and use sunlight to turn carbon dioxide and water into food and oxygen.In fact，algae produce over half of the oxygen people breathe.How important seawater is!Eac
23、h plant or animal in our seas and oceans is an important link in a food chain.The algae are eaten in large amounts by microscopic animals，which are in turn consumed by larger animals.These food chains are delicately balanced.The bad news about the food chains in the oceans is that they are under thr
24、eat because of man.People once thought that the oceans were so big that it didnt matter if we dumped rubbish into them or caught huge quantities of fish and whales for food.But we now know this is not true，and fish stocks in the oceans have started to drop.Thankfully，the world is taking steps to pro
25、tect the future of our oceans by introducing international agreements to protect marine habitats.Most countries have introduced fishing restrictions to protect fish stocks in the oceans，and new techniques are being pioneered to cope with pollution.Finally，the importance of protecting oceans is being
26、 made known to more people.This is just the beginning of a long process to protect the oceans for our future.We depend on the oceans for fish which are an important part of the human diet.How important seawater is!语篇解读本文主要阐述了海水的重要性。5Which of the following is the proper order of the food chain?Asmall
27、 animalsalgaemicroscopic animalslarge animalsmanBalgaemicroscopic animalslarge animalslarger animalsmanCsmall animalsalgaelarge animalsmicroscopic animalsmanDmicroscopic animalsalgaelarge animals larger animalsman解析：细节理解题。根据第二、三段内容可知答案。 答案：B6From the passage，we learn that_.Amost fish and sea animals
28、 live at the surface of the seasBit is very difficult to break the balance of a food chainCexcessive fishing has caused the decrease in fish stockDit wont be long before the problems concerning oceans will be solved解析：推理判断题。根据第四段中的“.fish stocks in the oceans have started to drop”可知大量捕捉鱼类肯定会造成鱼类储量的下降
29、；根据第二段首句可知选项A不正确；根据第三段中的“These food chains are delicately balanced.”可知选项B不正确；根据最后一段中的“This is just the beginning of a long process to protect the oceans for our future.”可知选项D不正确。答案：C7Which of the following is NOT a way being used to protect oceans?AThe use of international agreements.BForbidding fis
30、hing to protect fish stocks.CThe use of new techniques.DRaising peoples awareness of the need to protect oceans.解析：细节理解题。根据最后一段可知很多国家通过限制捕鱼数量来保护鱼类，但不是禁止捕鱼；其他几种措施在最后一段中都可找到。答案：B8What would be the best title of the passage?AThe importance of seawaterBLife in the oceansCHow to protect food chainsDHow to deal with seawater pollution解析：主旨推断题。根据文章的第一段，以及第二段和最后一段的末句可知文章的中心是在说明海水的重要性。答案：A