1、选择性必修三第二单元复习一选择性必修三第二单元复习一课本回眸课本回眸Task1Fill in the blanks.Passage oneWe often wonder what astronautsdaily life is like up in space and how it differsfrom that on the Earth. The low gravity 1._ (definite) makes ordinary thingsstrange!The first strange thing is how they sleep. Due to the near absence
2、of gravity inspace, they usually sleep in private quarters, 2._ are more like largecupboards, or in sleeping bags attached to the walls or the ceiling. The routine tasksthat occupy most of the day are 3._ (demand).The astronauts main mission is to conduct scientific research. They need toevaluate th
3、e effects of low gravity 4. _ animals and plants. They also needto carry out experiments in other research fields. With so much 5._ (go) on,the space station needs a lot of maintenance, so they constantly check support systemsand do some cleaning. The most challenging work takes place when they need
4、 toperform tasks outside the space station wearing our 6._ (spacesuit), whichallow them to breathe in space and protect them from exposure to the cold andradiation. Eating is also different in space. Its a luxury to eat fresh food, becausefresh produce such as fruit and vegetables can only 7._ (deli
5、ver) to the spacestation from the Earth every couple of months.Spending some time in the gym is of vital 8._ (important) to astronautshealth. They need to discipline 9._ (them) to do at least two hours ofexercise every day. During their leisure time, they sit back with the rest of the crewand watch
6、the remarkable planet go by, 10._ (take) pictures for their familyand friends back home.Passage twoThere are several reasons for space exploration. Firstly, it is in our nature toexplore. From the very early days of human life on the Earth, our 1. _(curious) about the unknown has kept us adventuring
7、 into new places. We desire toexplore the furthest frontier of all-space. 2. _ Stephen Hawking once said,“Remember to look up at the stars and not down at your feet. Try to make sense of 3._ you see and wonder about what makes the universe exist.” With eachspace mission comes greater insight, thus 4
8、. _ (motivate) us to continuealong the same path of adventure and allowing us to have a goodunderstanding ofthe origin, evolution, and likely future of the universe. 5. _ is through ourresearch into space that we have confirmed that the Earth is round and that it orbitsthe Sun. Furthermore, with tec
9、hnologies developed for space exploration, we cansolve some of the big problems 6. _ (face) mankind, making our lives saferand easier. These scientific and technological advances can provide benefits tosocieties on the Earth in many areas.Although space exploration demands huge 7. _ (invest), the sp
10、aceindustry can actually bring great economic value. It has been calculated that the globalspace economy is increasing 8. _ billions of dollars every year. At the sametime, space exploration can provide a variety of career opportunities for young people.Moreover, space exploration can provide educat
11、ion and inspiration for the nextgeneration, 9. _ is by far the biggest reason for humanity to explore space.Such wonders as a space shuttle launch or astronauts walking on the Moon are 10._ (incredible) exciting and inspiring to witness.Task2 Complete the following sentences.1. 重要的是我们应该从失败中吸取教训。 （vi
12、tal）It _ something from failure.2. 无论发生什么事，我们绝不能向困难屈服。 （倒装句 sense）_ give in to difficulties, whatever happens.3. 她鼓舞人心的演讲激励了许多毕业生申请成为一名志愿教师。 （motivate）Herinspiringspeech_avolunteer teacher.4. 让她生气的是她的队友在她不在场的情况下做出了决定。 （absence）_ was that her teammates made the decision_.5. 尽管他生病了，他依然坚持做实验。 （as）_ , h
13、e still carried on doing the experiment.6. 阅读能为拓宽孩子的眼界做出积极的贡献。 （make a positive contribution to）Readingcan _ childrens horizon.7. 正是通过我们对太空的研究，我们证实了地球是圆的，它绕着太阳转。 （用强调句型）_ we have confirmed the Earth is round andthat it orbits the Sun.8. 据估计，全球太空经济每年增长数十亿美元。 （calculate）_ the global space economy is i
14、ncreasingby billions of dollars every year.9. 在闲暇时间，我们最喜欢做的事就是和其他工作人员一起舒服地坐下来，看着我们非凡的地球经过，拍下照片给地球上的家人和朋友。During our leisure time, _ to sit back with therestofthecrewand_,_ for our family and friends back home.答案1. definitely2. which3. demanding4. on5. going6. spacesuits7. be delivered8. importance9.
15、 themselves10. takingPassage two1.curiosity2. As3. what4. motivating6. facing7. investment8. by9. which10. incrediblyTask 2 Complete the following sentences.1. It is vital that we should learn2. In no sense should we3. motivated many graduates to apply4. What made her angry / annoyed, in the absence of her / in her absence5. Ill as he was6. Reading can make a positive contribution to broadening7. It is through our research into space that8. It has been calculated that9. there s nothing we like more than, watch our remarkable planet go by, takingpictures
