第1期A1版Keys:(One possible version)封面故事1.They used yeast cells.2.Because many of the mechanisms that cause cells to age are similar in living things.九年级Unit1基础能力训练听力原文及参考答案听力原文第一节：听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C“三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。1.W:Michael,I know you can speak English very well.What about other foreign languages?M:I can also speak French.2.W:The summer holiday is coming soon.How are you going to spend it?M:I will go to Beijing with my cousin Jim.We are going to take part in an English summer campin a college.3.W:English is my favorite subject.How about yours,John?M:I like Chinese best,but I always get good grades in physics.W:Wow,I'm glad to hear that.I do badly in physics.Can you help me with it?M:Sure.Maybe we could study together on weekends.4.M:You speak English so well.Are you from America,Linda?W:No,I'm from Australia.I started to learn English from an early age.5.M:Our singing club is amazing.Would you like to join it?W:I'd love to,but I have already joined the dancing club and the reading club.第二节：听下面3段对话或独白。每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前你有时间阅读各小题，每小题5秒钟。听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。听下面一段对话，回答第6至第8三个小题。W:You look sad,Kevin.What's the matter?M:I didn't pass the English final exam last Friday.W:I am sorry to hear that.What problems do you have?M:I have trouble understanding English grammar.W:Maybe you should buy a good grammar book.It can be helpful.M:OK,I will buy one.Then how should I improve my reading skills?W:I think you should read some English magazines.M:Good idea.But the new words also trouble me.W:Don't worry about that.When you meet new words,you can guess their meanings or lookthem up in a dictionary.M:Thank you.I hope I can do better next time.听下面一段对话，回答第9至第11三个小题。W:Jim.You came back really late today.Did you stay at school to do homework again?M:No.But I played chess with my classmates.W:I called you,but you didn't answer the phone.

第4期B1版Keys:(One possible version客观题除外)课本链接1-4ACCB主题漫步1.funny2.music3.truly care about.4.cool5.hard-working第4期B2版Keys:(One possible version客观题除外)知识“串联”For Section A1.more outgoing 2.longer3.better4.taller5.more loudly6.funnier7.more clearly8.smarter9.more hard-working10.friendlier【跟踪练】1.better2.smarter3.more loudly4.taller·5.more outgoingFor Section B【英汉互译】1.be talented in2.the same as3.as long as4.be different from5.bring out6.关心；在意7.事实上8.与..相像的9.那就是为什么…10.善于应付...的【跟踪练】1.are talented in2.am similar to3.That's why4.In fact5.be different from语法点击1-5 BACAC写作一招鲜My parents are two common people.Now let me tell you something about them.My mother is a little shy,but my father is very outgoing.When they are out,my father alwaystalks a lot.Both of them enjoy eating rice.However,my mother likes to eat vegetables better,butmy father loves eating meat better.When they are free,my father often plays sports and watchessports shows,while my mother often reads books and watches movies.Also,they both enjoytraveling and they often take me to different places to have fun.Although they have many differences,they love each other.They always put our family firstand give me much love.第4期B3版Keys:(One possible version客观题除外)随堂练Section A(1a-2d)

-、1-5 CCACA6-10 ABCBB二、11-15 CADBC16-20 DABCA三、21-25 BDCCB26-30 DADCB31-35 DCFBA四、36.about37.However38.n039.teacher 40.but41.polite42.saying43.understand 44.use45.it五、A)46.It was started to show respect for doctors.47.It was on March 30.184248.The theme of this year is "Celebrating Resilience and Healing Hands".49.Because they change people's lives every day50.She thanks doctors for their hard work,long hours,and for putting their lives on the front line.B)Dear Peter,I am writing to give you some information about our classroom activity "Thank you,doctors”We hold this activity to show our thanks to the heroes who save people's lives all around theworld.This activity will be held in our class on Monday afternoon.We plan to watch a short videoabout the work of those heroes first.And then,we will have a discussion where everyone canshare the stories of their heroes.At last,medical workers from the local hospitals,who onceworked on the front line,will tell us about their work experience and what they have seen andthought about being doctors.It's a good chance to get close to doctors.I hope you will find this activity interesting andmeaningful.Yours,Li Hua【书面表达写作指导】本次写作要求写一封电子邮件，向交换生介绍“感谢白衣天使”的活动。写作时，首先引出活动的主题是什么；其次，具体介绍活动的情况；最后，表达期望。写作中可能用到的词（组）：hold this activity,.heroes,.have a discussion,stories;句型：It's a good chance toIhope.等。

(本小题满分12分)2),若设函数f(x)=e-ax,其中a∈R(1)讨论函数f(x)在[1，+0)上的极值；已-八常数项(2)若函数x)有两零点k且满足，1+A>1,求正实数A的取值范围的多【高三第三次联考·数学·共6页·第6页】

第4期Al版Keys:(One possible version)封面故事1.6.23km2.June203.develops harmony九年级（上）Unit2能力训练听力原文及参考答案听力原文I.短对话理解你将听到五段对话，每段对话后有一个小题。请在每小题所给的A、B、C三个选项中选出一个最佳选项。每段对话读两遍。1.M:Do you often watch TV when you stay at home alone?W:No.I often read books.It opens my eyes.2.M:Kitty,I'm hungry now.Do you want to cook by yourself or just eat at a restaurant near ourhome tonight?W:Oh,I'm so tired.Let's go out so that I can take a rest for a while.3.M:Are you at home alone,Betty?W:Yes.My mother has gone to the countryside to look after my sick grandmother and my fatherhas gone to London for an important meeting.4.W:Hi,Mike.You look so happy today.M:Yes,my parents will go'abroad on business.I have too many rules when they are at home.They will leave me alone at home so I can have fun in the following few days.5.W:I'd like to buy 40 storybooks for our class.M:I'm afraid we don't have enough of them.Let me count.Only 30 leftW:OK.I will take them all.I will have to borrow some from the school library then.Ⅱ.长对话理解你将听到两段对话，每段对话后有几个小题。请在每小题所给的A、B、C三个选项中选出一个最佳选项。每段对话读两遍。听下面一段对话，回答第6至7小题。M:Have you had the experience of being at home alone,Kate?W:Yes.I have.M:Can you look after yourself well?W:Yes,I can.M:How can you make sure you wake up early in the morning?W:My mobile phone can wake me up.M:How do you feel when you stay at home by yourself?W:I feel free at first,but after some time I feel lonely.听下面一段对话，回答第8至10小题。W:Have you got everything ready for the journey?M:Yes,I've put all my bags in my car outside.Mum,I'll ring you when I get to Beijing.W:Where are you going to stay?M:Robert says his father has already found a hotel for us.W:You will write to me,won't you?M:Of course I will,Mum,but I want to travel around Beijing first.Then I will write to you to tellyou my travel experiences.W:When I receive your letter,I'll write back at once.M:Oh.Mum,you needn't do that.We only plan to stay there for two weeks.When your letter

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