冀教版八年级下册英语 Unit 4 Lesson 19 课后作业B

Lesson 19Lesson 19How Do You Use the Internet?How Do You Use the Internet?.单项选择。1.I send a postcard to my sister _ email.A.byC.withB.inD.for2.Its necessary for us _ to our parents when we haveproblems.A.to talkC.talkB.talkingD.talks3.Victoria,hurry up!_ we cant arrive there on time.A.OrC.ButB.SoD.And4.There are _ in the classroom.A.not studentC.no studentsB.no studentD.not a student5.If we _ take environmental problems seriously,the earth_ worse and worse.A.dont;wont beC.wont;isB.wont;isntD.dont;will be.用括号内所给单词的适当形式填空。6.There are some children _(play)games under the tree.第1页共6页7.Where did you plan _(spend)your holiday?On the beach.8.You can use the knife _(cut)the apple.9.Mr.Liu used to _(fish)in the river in his spare time.10.They received a letter of _(invite)from their friend.按要求完成下列各题。11.He has over 2,000 books in his room.(改为同义句)He has _ _ 2,000 books in his room.12.I will send my research to him by email.(对画线部分提问)_ _ you send your research to him?13.I dont have brothers or sisters.(改为同义句)I have _ brothers _ sisters.14.Tell him the truth at once,or he will be angry.(改为 if 引导的条件句)_ _ dont tell him the truth at once,he will beangry.15.詹妮喜欢和她的朋友们在网上聊天。(根据汉语意思填空)Jenny likes _ _ her friends online.任务型阅读。We live in the age of the computer.People like scientists,teachers,writers and students use computers to do all kinds of work.第2页共6页But more than 30 years ago,computers couldnt do much.They werevery big and expensive.Very few people were interested in them andknew how to use them.Today computers are smaller and cheaper.Sincethey can do a lot of work,many people like to use them.Many peoplehave them at home.Computers become very important because they can work fasterthan men and make fewer mistakes.Computers can help people do alot of work.Writers now use computers to write.Teachers use themto teach.Students use them tostudy and childrenuse them to playgames.Computers can also remember what you put into them.Computersare very useful and helpful.They are our good friends.Do you wanta computer?16 题判断正(T)误(F)；17 题完成句子；1819 题简略回答问题；20 题将文中画线句子译成汉语。16.People like scientists,teachers,writers and students cantuse computers to do all kinds of work.()17.People didnt know how they _ _ _ in theold days.18.Could computers do much work 30 years ago?_19.Do students use computers to teach?第3页共6页_20_第4页共6页答案.1.A：句意：我通过电子邮件给我妹妹发了张明信片。by 意为“通过方式/方法”。2.A：Itsadj.(for sb.)to do sth.为固定句型。3.A：or 否则；so 所以；but 然而；and 并且。根据句意“维多利亚，快点儿！否则我们不能准时到那儿。”可知A 项符合句意。4.C：no 可修饰可数名词或不可数名词，由 There be 结构中的 be动词是 are 可知后面名词为可数名词复数，故选 C。5.D.6.playing：There be sb.doing sth.有某人正在做某事，为固定句型。7.to spend：plan to do sth.计划做某事。8.to cut：use.to do sth.“用去做某事”。9.fish：used to do sth.过去常常做某事。10.invitation.11.more than12.How will13.no；or14.If you15.chatting with.16.F17.could use computers18.No,they couldnt.19.No,they dont.20.电脑由于比人工作更快并且出错更少而变得十分重要。第5页共6页第6页共6页