1、Unit 5 Meeting your ancestors课时作业20单元加餐练.单词拼写1We should try to keep away from radioactive (放射性的) material in our daily life.2For a very long time, the scientists have always been trying to find out the significance (重要性) of exploring the Mars.3The doctor listened to his breathing and checked his pul
2、se (脉搏)4They use special chemicals to accelerate (加速) the growth of crops.5Skilful (熟练的) and confident, Donaldson should become one of the games best players.6Scientists have identified (确定) more than forty chemicals in tobacco smoke that cause cancer in humans and animals.7I have been so busy that
3、I havent had time to clear up the place which is so messy (凌乱的)8The reporter questioned the accuracy (准确) of the information in her WeChat.9There is no alternative (可能的选择) for him but to maintain order under any circumstances.10In the botanical (植物学的) garden, many people are admiring a variety of pl
4、ants.选词填空date back to, at most, be aware of, with relief, cut.up, look ahead, get/be fed up with, regardless of1Most parents are_aware_of the danger of their babies eating jelly nowadays.2In the end, I just got/was_fed_up_with his constant complaining.3The history of this country can date_back_to th
5、e Stone Age.4Regardless_of what it costs, we must take every measure to save the old mans life.5The passengers all sighed with_relief when the plane finally landed safely.6The robber ran away at_most half a mile and you can catch him if you speed up your car.7Dont lose heart. You should look_ahead,_
6、for a bright future is awaiting you.8There was only one piece of candy, so she cut it up into little pieces and gave them to the children.补全句子1He said, if_only_the_alarm_clock_had_rung.他说，要是当时闹钟响了就好了。2Mr Green must_have_been_punished for his being rude at the meeting.格林先生一定因为昨天在会上鲁莽的行为被处罚了。3He had_h
7、ardly/scarcely_arrived_when he had to leave again.他刚到达就又要离开了。4He lifted a stone only_to_drop it on his own feet.他搬起石头结果砸了自己的脚。5Having_known_the_situation_well,_they could deal with the problem efficiently.由于对形势的深刻了解，他们有效地处理了问题。6My interest in stamp collecting dates_from/back_to_my_schooldays.我从学生时代就
8、开始爱好集邮。7He_was_doing_his_homework_when the fire alarm went off.他正在做作业这时火灾报警器响了。8His parents died in the terrible accident, leaving_him_an_orphan.父母在可怕的事故中丧生，使他成为孤儿。9The factory set up the year before is_of_great_significance_to_this_areas_economy.前年建起的这个工厂对这个地区的经济有着重大的意义。.单元语法专练1The travel agency in
9、dustry has_been_trying_to_improve its image.旅行公司一直在试图改善其形象。2The two parties have_been_trying_to_unite since the New Year.自从新年以来，双方就一直在试图联手。3It has come to our knowledge that you have_been_cheating_the_company.据我们了解你一直欺骗公司。4To his mothers anger, he has_been_watching_TV all the morning.令他妈妈生气的是今天早上他一直
10、在看电视。5Mr Wang has to see the doctor because he has_been_coughing_a_lot_lately.王先生不得不去看医生因为最近他一直咳嗽得厉害。.阅读理解Zhoukoudian is a small village situated about 50 kilometers to the southwest of Beijing. In the 1920s, archaeologists discovered some prehistoric human bones there which changed peoples view of
11、Chinas history. They came from an unknown species of man and were the first evidence of human life in China thousands of years ago. The remains were three teeth!In 1929, a complete skull was also discovered. Eventually, archaeologists found almost 200 items, including six skulls and more than 150 te
12、eth. These discoveries proved the existence of a human species that lived in the area between 700,000 and 200,000 years ago. Four sites where Beijing Man and his relatives lived were discovered on the northern face of Longgushan. They lived in the caves in the area.However, the life span of Beijing
13、Man was short. About 70% of the people probably died before the age of 14. Fewer than 5% lived to the age of 50. Ashes were found alongside the fossils which showed they had used fire for cooking food and also for light, warmth, and protection against wild animals. This is the earliest evidence of t
14、he use of fire anywhere in the world. They also made tools of bones and stones. Unfortunately, when Japan invaded China in 1937, excavations at the Beijing Man Site stopped and most of the fossils disappeared, including a Beijing Man skull. After the Peoples Republic of China was established in 1949
15、, the work started again.Zhoukoudian was listed as a World Heritage Site in December 1987. It has not only given us important information about prehistoric Asian societies, but also provided amazing evidence about the process of evolution. Today, parts of the caves have been badly affected by rain.
16、Some areas are almost completely covered in weeds, causing serious damage. Pollution from the nearby factories has also contributed to the problem. This is a very serious matter and the Chinese Academy of Sciences is trying to raise public awareness of it.文章向我们介绍了周口店“北京人”遗址，它的位置、发现过程以及考古意义。1Archaeol
17、ogists _.Athought that Zhoukoudian was a beautiful villageBthought that the findings in Zhoukoudian wouldnt change the history of ChinaCdiscovered some prehistoric human bones in ZhoukoudianDthought that the findings in Zhoukoudian are the first evidence of human life in Asia答案：C解析：细节理解题。根据第一段中的“In
18、the 1920s, archaeologists discovered some prehistoric human bones there which changed peoples view of Chinas history.”可知答案。2Which of the following statements is NOT true?AThe digging was delayed by the Japanese invasion in the 1930s.BThese ancient Chinese were the first people to use fire in daily l
19、ife.CSome valuable things excavated from the site are still missing.DThe digging of Zhoukoudian is famous and is wellfunded.答案：D解析：推理判断题。根据最后一段后半部分描写的情况，长期以来，风吹雨淋、杂草丛生、破烂不堪。说明是没有进行修复，没有提得到资助的情况。故选项D说法是错误的。3Whats the main idea of the last paragraph?AThe digging of Zhoukoudian is still under way.BZhou
20、koudian plays an important part in the study of prehistoric societies.CZhoukoudian is a World Heritage Site.DZhoukoudian is in great need of protection.答案：D解析：段落大意题。本段在开头叙述完周口店对于考古的意义之后详细叙述周口店现在所处的糟糕状况，因此D项才是该段的大意。4From the passage, we can infer that _.Athe work of excavating the Beijing Man Site ha
21、s not proceeded smoothlyBBeijing Man had a short lifeCBeijing Man lived in the caves of LonggushanDarchaeologists found six complete skulls and more than 150 teeth in 1929答案：A解析：推理判断题。根据第三段的最后两句：对“北京人”遗址的发掘工作由于日本的侵略曾一度中止，新中国成立后，发掘工作又重新开始。由此可以推知对“北京人”遗址的发掘工作进展得不顺利。故选A。.读后续写阅读下面材料，根据其内容和所给段落开头语续写两段，使之
22、构成一篇完整的短文。续写的词数应为150左右。Tawny Nelson is a single mother of four sweet little girls aged nine, five, two, and one year old. Its not easy to take care of the girls all on her own. Recently, she shared a story with Frank Somerville, a news anchor for KTVU News in California. He was so moved by her story
23、 that he shared it on his Facebook page. Tawnys story opened with her visiting the grocery store. It was a rainy and miserable day and by the time she got all the girls loaded in the truck and ready to head home, it was dark and pouring down. When she tried to start her truck, it wouldnt start. With
24、 no one to call, Tawny turned to ask strangers for help to charge her truck. Hours passed and so did at least twenty people. They all ignored her. Tired and hungry, her daughters began to act out. Tawny was filled with tears when someone knocked on her passenger window.Somerville writes, “I swear I
25、got chills when I read what happened next.” And you will do the same when you read Tawnys story： I am the single mother of four absolutely beautiful little girls. They are nine, five, two, and one year old. And things have been particularly rough since my ex left. Our truck had a flat tire and I had
26、 to inflate it constantly. The driver side window motor died. And I needed a new belt. The truck was a mess. And we didnt drive anywhere unless we had to. Well, the other day we desperately needed to go to the store. So we loaded up and drove to the Winn Dixie about 9 blocks away. When we got out of
27、 the store it was far after dark. And it was raining heavily. I loaded my kids and groceries into the truck.答案Paragraph 1: My battery was dead. My phone broke down. I had no family to chat with and I had to do everything on my own. I turned to more than twenty people for help but they all turned me
28、down. My fiveyearold girl was very hungry and began to cry. My twoyearold daughter wanted to go home and my oldest girl tried to help. I felt that I was the worst mother ever.Paragraph 2：I was crying when a gentleman stopped and offered to help me. He handed me a plate of chicken and biscuits and bo
29、ttles of water. He said, “Feed your girls. I have a truck on the way and my wife will be here to take you home.” What he said was right. His wife arrived followed by their truck. We and the truck were taken home. The next morning the gentleman returned to my house with a man who replaced my battery and fixed my window. Seeing the scene I burst into tears.