2019_2020学年高中英语Unit4AstronomythescienceofthestarsSectionⅣGrammar

Section ⅣGrammar & Writing课时作业Ⅰ.单句语法填空1．—What has made John look like lacking sleep?—That he had to prepare for the coming exam and stayed up last night.2．What was the most important to her，she told me，was her family.3．It remains to be seen whether this plan is practical enough to keep the project going.4．It hasn't been made clear when the new underground line is to be open to traffic.It's maybe next year.5．—Is there any particular soup you would like to have?—Whichever you select is all right with me.6．It made Kate's parents excited that Kate entered the final in the tennis match.7．Whoever has helped to save the drowning old man is worth praising.8．Whether they would support us was a problem.9．Which type of computer he will buy needs discussing.10．How the book will sell depends on its author. And I think it'll sell well.Ⅱ.阅读理解ASatellites are an important part of our ordinary lives. For example, the information for weather forecasts is sent by satellite. Some satellites have cameras which take photographs of the Earth to show how clouds are moving. Satellites are also used to connect our international phone calls. Computer connections of the World Wide Web and Internet also use satellites. Many of our TV programmes come to US through satellites. Airplane pilots also sometimes use a satellite to help them find their exact location.We use satellites to send television pictures from one part of the world to another. They are usually 35,880 kilometres above the equator (赤道). Sometimes we can see a satellite in the sky and it seems to stay in the same place. This is because it is moving around the world at 11,000 kilometres an hour—exactly the same speed that the earth rotates (转动). A satellite must orbit the Earth with its antennae (天线) facing the earth. Sometimes, it moves away from its orbit, so there are little rockets on it which are used to put the satellite back in the right position. This usually happens about every five or six days.Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth. A satellite usually works for about 10～12 years. Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to the Earth to be repaired. Often, very old or broken satellites are left in space to orbit the Earth for a very long time. This is very serious because some satellites use nuclear power and they can crash into each other.【解题导语】本文是一篇科普说明文。

文章对各种卫星的用途、卫星工作的状态以及人们对已损坏卫星的处理办法进行了解释说明。

1．Which of the following is NOT done by satellites according to the passage?A．Sending information for weather forecasts.B．Taking photographs of the Earth.C．Sending TV pictures.D．Providing food for airplane pilots.解析：选D 细节理解题。

根据第一段和第三段首句不难看出，卫星可以传递天气预报信息、拍摄地球照片、传递电视图片等，但是没说为飞行员提供食物，所以选择D项。

2．Why does the satellite move around the world at the same speed as the Earth rotates?A．In order to take photographs.B．In order to stay in a certain position in the orbit.C．In order to move away from its orbit.D．In order to send television pictures.解析：选B 细节理解题。

根据第三段内容可以看出，卫星之所以用和地球自转相同的速度绕地球旋转，是为了保持在一定位置上。

显然B项正确。

3．What does the underlined word “This” in the 2nd paragraph refer to?A．A satellite.B．A little rocket.C．A satellite seems to stay in the same place in the sky.D．The satellite puts the rockets in the right position.解析：选C 代词指代题。

this在此替代前文的“Sometimes we can see a satellite in the sky and it seems to stay in the same place.”故选C项。

4．Which is TRUE of satellites?A．A satellite usually works for about 10～12 years.B．Every time a satellite gets broken, it is brought back to the Earth to be repaired.C．A broken satellite is never left in space.D．Broken satellites often crash into each other.解析：选A 细节理解题。

根据最后一段不难看出A项正确。

BA study by the British government has discovered the mental well­being of the country's teenage girls has worsened.The survey, which included 30,000 14­year­old students in 2005 and 2014, showed 37 percent of girls with psychological stress, up from 34 percent in 2005. British boys' stress level was actually seen to fall over the same time period, from 17 percent to 15 percent. The report's authors pointed out the “appearance of the social media age” could be a major contributing factor for increasing stress among teenage British girls.“The adolescent years are a time of rapid physi cal, cognitive and emotional development，” Pam Ramsden, a lecturer in psychology at the University of Bradford in the United Kingdom, wrote in a blog post. “T eenagers interact with people in order to learn how to become competent adults. In the past, they would engage with parents, teachers and other adults in their community as well as extended family members and friends. Now we can also add social media to that list of social and emotional development.”Throughout adolescence, girls and boys develop characteristics like confidence and self­control. Since teenage brains have not completely developed, teens don't have the cognitive awareness and impulse control to keep from posting inappropriate content. Furthermore, this content can easily be circulated far and wide with disastrous implications.“Social media can also feed into girls' insecurities about their appearance，” Ramsden said. “These sites are often filled with images of people with body type unattainable to the normal person. However, these images and the messages tied to them creep into social standards.”“Social media allows girls to make comparisons among friends as well as celebrities and then provides them with ‘solutions' such as extreme dieting tips and workouts to reach their goals，” Ramsden said.“Concerns about body image can negatively impact their quality of life preventing them from having healthy relationships and taking up time that could be better spent developing other aspects of their personalities.”【解题导语】本文是一篇科普说明文。