1、UnitUnit 4 4 SpaceSpace ExplorationExploration 单元加餐练单元加餐练 .阅读理解 In the future we might live somewhere other than Earth, like Mars. Some people ask how this will be possible. Well, Mars is in fact a lot the same as the earth. The days are almost the same as those on the earth. However, the two planet
2、s vary in temperature. Since there is mostly carbon dioxide on Mars, it would be quite difficult for a human to just land on it. So, special types of homes and space suits have to be designed. The space suits should be almost like the ones astronauts use now, and except that they have to be warmer s
3、o that the astronauts can survive the cold temperatures. The space suits must also be able to withstand (承受) high pressure and potentially dangerous radiation that can kill. The houses should be similar to our homes today with a slight difference. All of the houses and other buildings should be buil
4、t inside a large dome (圆顶状物) or bubble. The domes should be made out of glass, and would also be able to prevent radiation from affecting the people inside. The domes will be connected to a machine (like plants which turn carbon dioxide into oxygen) With Mars population growing, how would the people
5、 on its surface get fresh food and water? Just like humans use domes, they can also use domes to grow plants. However, the domes where the plants are grown must be built to expand. Once we upgrade the domes to a larger size then we can grow more food by cultivating (种植) more plants. To get the food
6、or dome in connection with other domes, there will be long narrow tunnels like roads that connect to each dome separating them by several doors so that the pressure in each dome can remain the same. On Mars, so many other things are available to us. As humans, we can have access to rare and fairly e
7、xpensive metals that arent very easy to get hold of on Earth, and a colony on Mars enhances (提高) our chances of finding these metals. So when someone here on Earth says that going to Mars is impossible, please tell them that theyll never know it until they try and they may try very soon. After all i
8、ts our future. Why not make it on Mars? 本文为说明文。文章介绍了目前人类对火星的探索。 1It is difficult for humans to live on Mars because of all the following EXCEPT _. Atoo much radiationBcold temperature Clack of enough oxygenDlack of houses 2One of the reasons why we are eager to explore Mars may be that _. Awe can fi
9、nd rare and expensive metals there easily Bwell get too bored to live on the earth in the future Cour technology will become much advanced Dwe want to know more about the unknown world 3What is the authors attitude towards living on Mars? APessimistic.BUncertain. COptimistic.DOpposed. .七选五 Why play
10、sports? You might say “to get exercise” and youd be right. To have fun? Thats true, too. But theres more. _1_ According to the Womens Sports Foundation, girls who play sports get a lot more than just fit. Girls who play sports do better in school. You might think that athletics will takeupallyourstu
11、dytime._2_Exerciseimproveslearning,memory,and concentration, which can give active girls an advantage in the classroom. Girls who play sports learn teamwork and goalsetting skills. _3_ When working with coaches, trainers, and teammates to win games and achieve goals, youre learning how to be success
12、ful. Those skills will serve you well at work and in family life. Sports are good for a girls health. In addition to being fit and keeping a healthy weight, girls who play sports are also less likely to smoke. And later in life, girls who exercise are less likely to get breast cancer or osteoporosis
13、 (骨质疏松症) Playing sports improves selfconfidence. _4_ Why? It builds confidence when you know you can practice, improve, and achieve your goals. Sports are also a feelgood activity because they help girls get in shape, keep a healthy weight, and make new friends. _5_ Playing sports can reduce stress
14、and help you feel a little happier. How? The brain chemicals released during exercise improve a persons mood. Friends are another moodlifter. And being in a team creates tight bonds between friends. Its good to know your teammates will support youboth on and off the field! AExercise cuts the pressur
15、e. BSports teach valuable life skills. CRegular exercise increases quality of life. DIn fact, there are at least five more reasons. EGirls who play sports feel better about themselves. FPlaying sports offers children more than just physical benefits. GBut research shows that girls who play sports do
16、 better in school than those who dont. .完形填空 MacArthurs love for sailing dates back to when she was just 4 years old, when she first got the opportunity to have a try on a boat. “It kind of _1_ me that this boat had everything we needed to take us anywhere in the world. And as a child， that opened u
17、p everything and made me feel the greatest sense of _2_，” she explained. This experience _3_ a passion within MacArthur that she wanted to sail around the world. Growing up in the countryside. she had no idea how to _4_ it. However, she knew that was what she wanted to do at some stage. So she acqui
18、red knowledge and _5_ for years to seek her dream in sailing. Having merely potatoes and beans every day for eight years, she _6_ could afford the right equipment. By reaching such _7_ goals and asking technical questions about _8_， MacArthur felt as though she was getting _9_ to her ambition. “The
19、impossible could be possible and _10_ high is not necessarily such a crazy thing to do.” she said. And it seems that MacArthurs _11_ to become a sailor went beyond her expectations. At the age of 24,she started to _12_ media attention after winning the second place in the Vendee Globe, a singlehande
20、d nonstop yacht (帆船) race that went around the world. Four years later, MacArthur chose to sail for 71 days and 14 hours, _13_ more than 26,000 miles. This led to her scoring a new record. _14_ this record has since been surpassed (超过)，MacArthur is still considered as Britains most successful offsho
21、re racer. So when you know where youre going, you can actually get thereeven if it seems _15_！ 本文为传记类记叙文。4 岁时候的一次航海经历点燃了麦克阿瑟想环游世界的激情，她 最终实现了梦想，把不可能变成了可能。 1A.benefitedBstruck CtaughtDtreated 2A.wonderBmagic CdirectionDfreedom 3A.lightedBleft CcarriedDinvented 4A.approachBgain CachieveDforget 5A.made
22、upBsaved up Cturned upDpicked up 6A.eventuallyBfortunately CgraduallyDdefinitely 7A.personalBfinancial CfinalDacademic 8A.schoolBsailing CdrivingDbusiness 9A.furtherBdeeper CcloserDsmarter 10A.workingBdesigning CmeaningDaiming 11A.lessonBmind CconfidenceDplan 12A.acceptBreceive CenjoyDkeep 13A.inclu
23、dingBreaching CcoveringDfloating 14A.AfterBWhen CWhetherDWhile 15A.impossibleBconstant CvaluableDavailable .概要写作 阅读下面短文，根据其内容写一篇 60 词左右的内容概要。 Although some people dont like using automatic hand dryers in restrooms, it may actually be argued that motionsensing hand dryers are a practical alternative
24、to paper towels. I believe that our school would benefit from investing in automatic hand dryers in all the restrooms. First of all, the automatic hand dryer is very sanitary (卫生的). Instead of pulling on a lever (手柄) touched by a large number of students, users can just stick their hands under the a
25、ir dryer. No bacteria can get on them because there is nothing to touch. Kids wouldnt get sick from the paper towel dispensers (纸巾盒) In addition, if the school buys automatic hand dryers, we can save money. There is a terrible waste of paper towels in the restrooms. Students continuously pull on the
26、 lever for unneeded towels until the dispensers are empty. An automatic hand dryer costs about $500, with very little additional cost over time while paper towels can cost $25 a case, or about $500 a year. After just one year, it would pay for itself. Finally, our bathroom is a paper towel mess! The
27、re are always piles of paper towels on the floor. Sometimes the extras fall from the dispenser unused. Many times kids make their used towel into a ball and aim for a basket. But if they miss the target, the paper ball stays on the floor. Paper towels leave so much litter in the restrooms that the r
28、estrooms are a mess. People use the hand dryers for just a few seconds, and they think that automatic hand dryers dont dry their hands as thoroughly as paper towels. However, studies have shown that when people dry their hands for at least 30 seconds, automatic dryers actually dry much better than paper towels. It is difficult to get every part of your hand dry using paper towels, but the air can if you take a few extra seconds. As you see there are some good points, lets install automatic hand dryers as soon as possible!
