1、Unit5 Section BUsing language一、翻译句子翻译下列句子,体会it的用法。1.今天是个好日子。2.妈妈给了我一件礼物,但是我把它弄丢了。3.他觉得学好英语很有用。4.大象的腿跟树干一样圆而高,这点显而易见。5.你该睡觉了。6.这是我第一次去北京。7.孩子们被要求在晚上十点前上床睡觉。8.我是在昨天晚上见到 Mike 的。二、阅读理解Guam is a beautiful, small island in the Pacific Ocean.Youll find happy songbirds, clear blue water, and leafy forest th
2、ere.But the small island has a big problem：snakes.There are about 2 million brown tree snakes living in Guam.The snakes likely arrived in the 1940s.They probably slipped(滑行)unseen onto ships and planes heading to Guam.Once there, the snakes laid eggs.Snake families grew.The snakes have no natural en
3、emies to eat them on Guam.Soon, the island was covered with these snakes.The brown tree snake has had a devastating effect.The snakes eat birds.There used to be 12 kinds of birds on the island.But these snakes have killed off nine kinds of the birds.The snakes can grow to be 10 feet long.They often
4、bite humans.They climb onto power lines and make the electricity go out.This causes millions of dollars in damage.Scientists have tried many different ways to control the number of snakes.They have used snake traps and snakesniffing dogs.Nothing seemed to work.Nothing, that is, until they found a su
5、rprising secret weapon：killer mice.Scientists found out that there is one easy way to kill brown tree snakes.They could give them a medicine called Tylenol.People take Tylenol for headaches and other pains.Even a little bit of Tylenol can kill a brown tree snake.But how would scientists get the tree
6、 snakes to eat Tylenol? They came up with a plan.First, the experts put the medicine into dead mice.Then they attached each mouse to a mini paper parachute(降落伞)Planes dropped the mice over Guam.The parachutes got caught in the trees.The mice became dinner for the snakes that live there.Has it worked
7、? So far, research shows that there are fewer snakes because of the mice.The worry is that it may be too late to clear the snakes, but Mr Vice from Guams Department of Agriculture says this should not stop the islanders from trying.“Our longterm goal is to kill the snake off completely，” he says.1Wh
8、at can we learn about the brown tree snakes?AThey were shipped to Guam on purpose.BThey were not native to Guam.CThey were at risk in the 1940s.DThey grew very slowly.2What does the underlined word “devastating” in Paragraph 3 mean?AMagical.BInteresting.CShortterm.DDamaging.3What was a more workable
9、 way to kill the brown tree snakes?AUsing snake traps.BPutting Tylenol in the trees.CBringing in their enemies.DLetting them eat Tylenol carried by mice.4What does Mr Vice think of solving this snake problem?AHe is proud of it.BHe is hopeful of it.CHe is doubtful about it.DHe is unconcerned about it
10、.三、阅读七选五While plenty of birdssuch as swallows,hawks and hummingbirdsmigrate(迁徙) during the day,the majority of land birds travel at night.Migration at night has at least three advantages.1 Secondly,the air in the atmosphere is usually more stable than during the day.Lastly the air is cooler at night
11、.A migrating bird produces a huge amount of heat that needs to be released.Most of the heat is lost from the unfeathered legs.2Night-time migrators include sparrows,warblers,flycatchers,thrushes,orioles and cuckoos.Most of them dont live in vast open places.3 They arent the best fliers,so they need
12、the thick coverage to avoid enemies.But flying at night is becoming more dangerous than it used to be.4 A well-lit high-rise can kill hundreds of migrating birds in a single night,an issue that has started to attract more public concern.In cities like New York,Chicago and Houston,some skyscrapers an
13、d other landmarks now have “lights out” programs during key bird migration times in the fall and spring.5 A protein called cryptochrome,which is sensitive to blue light is thought to be the key to making this happen.Cryptochromes from migratory birds have evolved to require less light and to allow t
14、heir recognition of blue light to sense and respond to magnetic fields (磁场).A.Instead,they live in the woods and other sheltered habitats.B.Birds need the heat to keep warm and maintain a good state.C.Birds do not have to worry about attacks from dangerous birds.D.Only when there is enough light can
15、 they get signals to migrate.E.Migrating birds use Earths magnetic fields to help them navigate.F.Lights on buildings and towers confuse birds,causing them to crash.G.The colder the air temperature is,the more quickly that heat can be released.一、翻译句子1.It is a nice day today.2.My mother gave me a gif
16、t,but I lost it.3.He felt it useful learning English well.4.It is very clear that the elephants leg is round and tall like a tree trunk.5.Its time (that) you went/should go to bed.6.This is the first time that I have been to Beijing.7.It is requested that children should go to bed before 10 pm8.It w
17、as last night that I met Mike.二、阅读理解1.B推理判断题。根据第二段前两句可知，蛇可能是在20世纪40年代出现的。它们可能趁人不注意溜上了前往Guam岛的船只和飞机。由此推断出，棕树蛇不是Guam岛的本地物种。2.D词义猜测题。根据后文可知，棕树蛇吃鸟，岛上曾经有12种鸟类，但是这些蛇已经杀死了九种鸟类。蛇可以长到10英尺长，它们经常咬人。它们爬上电线，让电力供应中断，这造成了数百万美元的损失。以上说明了这种蛇的危害性很大。由此可以推断出画线词devastating意思是“有破坏性的”。故选D项。3.D细节理解题。根据第四至六段内容可知，杀死棕树蛇的一个有效方法
18、是让它们吃携带Tylenol的老鼠。4.B推理判断题。根据最后一段中Guam岛农业部的Vice先生说：“这不应该阻止岛民的尝试。我们的长期目标是彻底消灭蛇。”可推断出，Vice先生对解决蛇的问题满怀希望。三、阅读七选五1.C根据上文“Migration at night has at least three advantages.”可知,夜间迁徙至少有三个好处。再根据下文两句的“Secondly”和“Lastly”可知,本句是有关夜间迁徙的第一个好处。根据第三段最后一句“They arent the best fliers,so they need the thick coverage to
19、avoid enemies.”可知,夜间迁徙的第一个好处是可以躲避敌人。故C项(鸟类不必担心来自危险的鸟类的攻击。)符合题意。故选C项。2.G根据上文“Most of the heat is lost from the unfeathered legs.”(大部分的热量是从没有羽毛的腿上流失的。)可知,本句有关热量释放。故G项(气温越低,热量释放得越快。)符合题意。故选G项。3.A根据上文“Most of them dont live in vast open places.”可知,它们中的大多数并不生活在广阔的开阔地带。因此本句应该有关夜间迁徙的鸟类的生活地带。A项(相反,它们生活在森林和其他隐蔽的栖息地。)符合题意。故选A项。4.F根据前文“But flying at night is becoming more dangerous than it used to be.”可知,夜间飞行变得比以前更危险了。F项(建筑物和塔楼上的灯把鸟弄糊涂了,导致它们坠毁。)具体说明夜间飞行比以前更危险。故F项是对上文的补充说明,符合题意。故选F项。5.E分析本段可知,本段主要介绍鸟类的一种蛋白质隐色素如何识别蓝光来感知和响应磁场。E项(候鸟利用地球磁场帮助它们导航。)适合做本段主旨句,符合题意。故选E项。第9页（共9页）
