1、Unit 1 Great scientists Reading 课时作业阅读理解AEvery day, young people across the globe are doing their part to keep the Earth healthy and green. These are just a few kid heroes for the planet.Manatee MinderWhen she was in second grade, Stephanie Cohen read about a baby manatee hit by a boat off the coast
2、 of Florida. Marine biologists saved the manatee. But caring for the sea creature was costly, Stephanie took up a collection and raised $27 in one day. Now 18, Stephanie still raises money to help these“gentle giants”She sells manatee decorations, candles and cards on her website kmad.org.Color Us G
3、reen!At Clarendon Elementary School, in Secaucus, New Jersey, the students know what to do with old, used and broken crayons. Recycle them! They collect the crayons and send them to Crazy Crayons, where they are made into different shapes and sizes. In the past eight years, New Jersey students have
4、recycled nearly nine tons of crayons.Goodbye，Paper Bags!When Adrienne Boukis, 15, was in sixth grade, in Walnut Creek, California, she noticed that many of her classmates carried paper lunch bags. To help kids cut down on waste, she invented a reusable lunch bag, which is partially made from recycle
5、d plastic bottles. She sells the bags at and some of the proceeds go to charity that is in need of money.Hes Skiing to Save the EarthParker Liautaud，15，wanted to raise awareness(意识) about the effects of climate change on the polar regions. He set out to become one of the youngest people ever to ski
6、 to the North Pole. Parker feels he has met his goal to inspire others.“All young people have the power to make a change， ”he said in an interview.【解题导语】 每天，全球的年轻人们都在为地球的健康贡献着自己的一份力量。本文主要介绍了几个年轻人是怎样保护地球的。1What do the kid heroes have in common?AThey are all high school students.BThey all involve them
7、selves in green activities.CThey all raise money for green activities.DThey are all from poor families.B 解析：细节理解题。根据第一段内容可知文中提到的孩子都在环保上做出了贡献。2According to the passage, kmad.org_Aprovides some goods sold onlineBwas designed by Adrienne BoukisCfocuses on the protection of sea creaturesDinspires kids t
8、o raise money for the manateeA 解析：细节理解题。根据 Manatee Minder 中的末句可知答案。3The underlined word “proceeds” in the passage probably means_Amoney BbagsCgoods DgiftsA 解析：词义猜测题。根据 “She sells the bags.”可知艾德丽安布克斯把卖包得来的部分钱捐给了慈善组织。4In Parkers opinion, every kid_Ashould travel to the North PoleBcan succeed at an ear
9、ly ageCshould set a great goalDcan make a difference D 解析：推理判断题。根据文章末句 “All young people have the power to make a change.”可知每个孩子都能为环保做出贡献。BYou try to enjoy your dinner in a garden, but several mosquitoes fly around you all the time. A minute later, you have a red bite on your leg. As you madly wave
10、your hands, trying to get rid of these pests, you notice that others seem completely undisturbed. Could it be that mosquitoes prefer to bite some people over others? The short answer is yes. The experts have proved that mosquitoes do show blood preferences. But they are not biting for dinner. Female
11、 mosquitoes (males do not bite people) need human blood to develop eggs. Obviously, not just anyones blood will do.People with a high level of steroids(类固醇) or cholesterol(胆固醇) on their skin surface attract mosquitoes. “That doesnt necessarily mean that mosquitoes prey on people with higher overall
12、levels of cholesterol， ” Butler explains. These people simply may be more efficient at processing cholesterol, and the byproducts of that remaining on the skins surface are attractive to mosquitoes.“Mosquitoes also target people who produce large amounts of certain acids， ” explains John Edman, phD,
13、 spokesman for the Entomological Society of America. These acids can trigger mosquitoes sense of smell, attracting them to land on unsuspecting victims.Mosquitoes can smell their dinner from an impressive distance of up to 50 meters. This isnt good news for people who give off large quantities of ca
14、rbon dioxide. Any type of carbon dioxide is attractive. And larger people tend to give off more carbon dioxide, which is why mosquitoes typically prefer adults to small children. Pregnant(怀孕的) women are at increased risk, as they produce a greaterthannormal amount of carbon dioxide.Movement and heat
15、 also attract mosquitoes. Therefore, if you want to avoid a mosquito bite at your next outdoor dinner, find a bench rather than a spot on the volleyball team. Heres why: as you run around the volleyball court, mosquitoes sense your movement and head toward you. Whats more, the heat from your sweatin
16、g body draws them closer.【解题导语】 本文介绍了蚊子喜欢叮咬的人群的特点。5According to the passage, why do the female mosquitoes bite people?ABecause they feed on human blood.BBecause they like the taste of human blood.CBecause they want to produce the next generation.DBecause they dont like the smell of people.C 解析：细节理解题
17、。根据文章第一段倒数第二句 Female mosquitoes (males do not bite people) need human blood to develop eggs.可知母蚊子需要人血来培养下一代。6What does the underlined word “trigger” in Paragraph 3 mean?AMake something to be worse.BCause something to be active.CCause damage to something.DGet back the use of something.B 解析：词义猜测题。根据画线
18、词后面的 attracting them to land on unsuspecting victims 可推出，画线词意为“触发，激发” 。7According to the passage, who is more likely to attract mosquitoes?AA boy sleeping on the couch.BA man with type A blood.CA girl with normal levels of steroids.DA woman who is going to give birth to a baby.D 解析：细节理解题。根据文章大意及第四段最
19、后一句 Pregnant(怀孕的) women are at increased risk, as they produce a greaterthannormal amount of carbon dioxide.可知，孕妇更有可能吸引蚊子。8What is the authors purpose of writing this passage?ATo teach some ways to avoid mosquitoes bites.BTo warn people not to have dinner outside.CTo introduce what kind of people mo
20、squitoes like best.DTo explain why the smell of carbon dioxide attracts mosquitoes.C 解析：写作意图题。根据文章大意可知，本文主要介绍哪些人更吸引蚊子。CPeople seem to have a natural need for friends and with good reason.Friends increase your enjoyment of life and relieve feelings of loneliness.They even can help reduce stress and i
21、mprove your health.Having good friends is especially helpful when you are going through any kind of hard time such as when you are experiencing anxiety，panic attacks，or depression.When you are with good friends you feel good about yourself，and you are glad to be with them.A friend is someone whoyou
22、like，respect，and trust ，and who likes，respects and trusts youdoesnt always understand you，but accepts and likes you as you are，even as you grow and changeallows you the space to change，grow，make decisions，and even make mistakeslistens to you and shares with you both the good times and the bad timesr
23、espects your need for secrets，so you can tell them anythinglets you freely express your feelings and emotions without judging，teasing，or criticizing youaccepts the limitations you have put on yourself and helps you to remove themA person once said， “Friendship is a continuing source of bonding(连接) ，
24、releasing，and creating in yourself and with the other person.There is an emotional bond between the two people.”A good friend or supporter may or may not be the same age or the same sex as you，and may not have the same educational，cultural，or religious background，or share interests that are similar
25、to yours.Friendships also have different depths.Some are closer to the heart and some more superficial，but theyre all useful and good.9Which of the following is NOT a function of a friend?AHe brings you some happiness.BHe helps you feel less lonely.CHe helps you get over the difficulties.DHe helps y
26、ou cheat on the exam.D 解析：细节理解题。根据第一段中的 Friends increase your enjoyment of life and relieve feelings of loneliness.They even can help reduce stress and improve your health.Having good friends is especially helpful when you are going through any kind of hard time such as when you are experiencing anx
27、iety，panic attacks，or depression.可知，朋友可以增加生活的乐趣，减少孤独，减轻压力，改善健康状况，度过困难的时光，而没有提到 D 项。10The underlined word “superficial” in the last paragraph means “_”Adeep B.hardCshallow D.closeC 解析：词义猜测题。根据最后一段中的 Friendships also have different depths.Some are closer to the heart and some more superficial，but they
28、re all useful and good.可知，友谊有不同的深度，有些会贴近内心，有些会很浅，但他们都是有用的都是好的，故选 C 项。11Which is the best title for the passage?AA Friend in Need Is a Friend IndeedBWhat Kind of Person a Friend Should BeCTo Be a Good FriendDHow to Get on with Your FriendB 解析：标题归纳题。文章在讲好朋友在生活中所起的作用，友谊是两个人之间的情感桥梁，不分种族，不分性别和宗教，故 B 项更符合
29、文意。书面表达假如你是李华，请就本校食堂服务(canteen service) 的状况给校长写一封信。内容包括：优点 不足 建议食堂干净 价格偏高饭菜可口 种类偏少服务态度好 等候时间较长注意：1.词数 100 左右；2可以适当增加细节，以使行文连贯；3开头语和结束语已为你写好，不计入总词数。Dear Mr.Principal，I am a senior student of our school.Id like to say something about the canteen service in our school._Sincerely yours，Li HuaOne possibl
30、e version：Dear_Mr.Principal，I_am_a_senior_student_of_our_school.Id_like_to_say_something_about_the_canteen_service_in_our_school.In general, the service is satisfactory.The hall is clean and tidy.The dishes look inviting and taste delicious as well.Whats more, the workers there treat us as their fri
31、ends, which makes us feel very happy.However, we feel the price of the meals is a little too high.Besides, we can only have a limited variety of dishes with little change every week.In addition, we often have to stand in line for a long time before we can get the meal.You could understand how precious time is to us students.For myself suggestion box aimed at getting more proper advice from the students should be set up so as to improve the quality of the canteen service.Thanks for your consideration.Sincerely_yours，Li_Hua
