【练闯考】2015秋九年级英语（新版人教新目标）上全单元教案：Unit 8　It must belong to Carla

Unit 8　It must belong to Carla.
Section A(1a－2d)
1．重点单词：whose，truck，rabbit，attend，valuable，pink，picnic，anybody
2．重点短语：belong to，at the picnic，pick up
3．重点句式：
—Whose volleyball is this
—It must be Carla's.She loves volleyball.
The hair band might belong to Linda.
It can't be stolen.
It could be Mei's hair band.
1．重点短语和句型
2．must，might，could和can't 表示推测的用法
must，might，could和can't 表示推测的用法
一、预习课本P57－58新单词并背诵，完成下面的汉译英。
1．谁的________　　　　2.卡车________
3．野兔________ 4.出席________
5．贵重的________ 6.粉红色________
7．野餐________ 8.任何人________
二、认真预习1a－2d找出下列短语和句型。
1．属于________________________________________________________________________
2．参加野餐________________________________________________________________________
3．捡起________________________________________________________________________
4．—这是谁的排球？
—它一定是卡拉的。她喜欢排球。
________________________________________________________________________
________________________________________________________________________
5．这个发带可能是琳达的。
________________________________________________________________________
6．它不可能被偷了。________________________________________________________________________
7．它或许是梅的发带。________________________________________________________________________
Step 1　情景导入
(Come to a st ( http: / / www.21cnjy.com )udent，pick up a pen)Teacher：The pen is Huang Ming's.We can also say，“The pen belongs to Huang Ming.”Now please say sentences with your school things like this.
环节说明：过渡自然，介绍词组belong to的用法。
Step 2　完成教材1a－1c的任务
1．在1a表格相应的栏目下补充更多的你看到的物品，完成后小组内互相交流答案。(3分钟)
2．认真听录音，根据对话内容将1b表格中的人物、物品和原因匹配，完成后集体核对答案。(3分钟)
3．再听一遍录音，并跟读对话。(3分钟)
4．两人一组练习1c中的对话，然后利用1b中的信息仿照1c的形式编练新的对话，完成后要求几组学生表演对话。(5分钟)。
参考案例
A：Whose book is this
B：It must be Mary's.J.K.Rowling is her favorite writer.
5．小结训练。(3分钟)
(C)1.The book be Li Ping's because his name is on it.
A．can't　　B．may　　C．must　　D．could
(D)2.—Do you know ________ book is this
—Sorry，I don't know.
A．who B．whom C．who's D．whose
(C)3.—Whose book is this
—The book ________ Jim.
A．belongs B．is belong
C．belongs to D．is belong to
(B)4.—Whose book is this
—It must be ________.
A．Mary B．Mary's
C．to Mary D．to Mary's
环节说明：听说结合，第一时间向学生传达语言目标，通过结对对话练习和小结训练，使语言目标得以强化。
Step 3　完成教材2a－2c的任务
1.鲍勃和安娜在公园捡到了一个书包，听录音，写出书包里的东西，集体核对答案，完成2a的任务。(3分钟)
2．再认真听一遍录音，根据听到的内容，完成2b中的填空，完成后请几名学生展示答案，教师点拨。(3分钟)
3．听第三遍录音，学生跟读整体感知对话。(3分钟)
4．两人一组利用2a和2b中的信息，仿照2c的形式编练新的对话，邀请几组学生表演新的对话。(5分钟)
参考案例
A：Look！There's a schoolbag here.
B：What's inside
A：There's a T shirt，...
5．小结训练。(3分钟)
(B)1.—Do you know whose book is this
—I'm not sure，it ________ be Jim's.
A．mustn't　B．may　　C．can't　　D．should
(A)2.The red bicycle ________ be Hu's.I just saw him riding it.
A．must B．might C．could D．can't
(A)3.—Is the girl your classmate，Mary
—No，it ________ be her.She is much thinner.
A．can't B．needn't C．mustn't D．may not
环节说明：通过听、说、读 ( http: / / www.21cnjy.com )、写学习训练让学生熟练掌握must，might，could和can't 表示推测的用法；同时学生的口语表达能力在这一环节得到提升。
Step 4　完成教材2d的任务
1．学生自读对话，完成下面的问题。(5分钟)
1)判断正(T)误(F)；2)根据对话内容填空；3)回答问题；4)英译汉。
1)Linda found her schoolbag in the end.(F)
2)Linda attended a_concert yesterday.
3)What did Linda do after the concert
She_went_to_a_picnic.
4)I'll call them now to check if anybody has it.
我现在就给他们打电话确认一下是否有人捡到了它。
2．大声朗读2d中的对话，读熟后与同伴结对练习，分角色表演对话。(3分钟)
3．邀请三组来表演对话。(5分钟)
4．小结训练。(3分钟)
(A)1.—Would you like to play football with me tomorrow
—Sorry，I have to ________ an important meeting.
A．attend B．lift C．support D．hug
(C)2.—I lost my schoolbag yesterday.Do you know who ________？
—Sorry，I don't know.
A．picks up them B．picks them up
C．picks it up D．picks up it
(A)3.There is ________ in the bag，so we must find the owner of the bag.
A．something valuable B．valuable something
C．anything valuable D．valuable anything
(B)4.He was ________ the picnic yesterday afternoon.
A．in B．at C．on D．of
环节说明：将对话问题化，既能锻炼学生的思维能力又能加深对课文的理解。小结训练又对对话中的重要句型进行了巩固加深。
Step 5　问题探究
1．这本书一定属于卡拉。The_book_must_belong_to_Carla.
动词短语belong_to的意思是“属 ( http: / / www.21cnjy.com )于”，它的后面用名词或者代词作宾语，belong to没有被动语态也没有进行时态。经常用在句型Something＋belongs to＋somebody中表示“某物属于某人”，它相当于Something＋be＋somebody's。
2．这是谁的自行车？
Whose_bike_is_this
whose是疑问代词who的所有格 ( http: / / www.21cnjy.com )形式，在句子中既可以作定语也可以作表语。用“Whose＋名词＋一般疑问句”或者“Whose＋be＋名词”来询问“某物是谁的”。
3．must，may，could，might和can't 表示猜测的用法。
1)这张照片一定是玛丽的，那是她的父母。
This_picture_must_be_Mary's，those_are_her_parents.
2)我的朋友丢了他的手表，这个可能是他的，但是我不确定。
My_friend_has_lost_his_watch.This_may_be_his.But_I_am_not_sure.
3)那一辆红色的自行车不可能是你妈妈的。
That_red_bike_can't_be_your_mother's.
must用于肯定句中，表示说话人对事物的推测把握最大，意思是“一定；准是”。
may/might/could这三个词都 ( http: / / www.21cnjy.com )可以表示说话人对事物的推测，但可能性较小，意思是“有可能；也许”。其中might/could比may较为委婉客气和更加不肯定。can表示推测，主要用于肯定句和疑问句。can't表示有把握的否定推测，意思是“不可能”。
请学生们做前面课时训练部分。
Section A(3a－3c)
1．重点单词：happening，noise，policeman，wolf，uneasy
2．重点句式：
Nothing much ever happened around here.
I couldn't see a dog or anything else，either.
I think it's too big to be a dog.
There must be something visiting the homes in our neighborhood.
1．重点短语和句型
2．must，could，might和can't表示推测
must，could，might和can't表示推测
一、预习课本P59新单词并背诵，完成下面的汉译英。
1．声音；噪音________　　　　2.男警察________
3．狼________
二、认真预习3a－3c找出下列句型。
1．在这周围没发生过什么事情。
________________________________________________________________________
2．我也没看见一只狗和其他的任何东西。
________________________________________________________________________
3．我认为它太大了，不会是一条狗。
________________________________________________________________________
4．一定有什么东西光顾了我们小区。
________________________________________________________________________
Step 1　情景导入
Teacher：There is a to ( http: / / www.21cnjy.com )wn，and it used to be quiet，but now something unusual is happening.Every night people there could hear strange noises outside their windows.But none of them knows who made the noises.Do you want to know what happened on earth？OK，let's learn the article together.
环节说明：由小区的神秘声音入手，引起了学生的好奇心，同时也能激起学生的学习兴趣。
Step 2　完成教材3a－3c的任务
1．快速阅读短文，从3a方框中找出最合适的标题，完成后小组内讨论，教师点拨。(3分钟)
2．阅读3b中的词义解释，然后认真阅读3a短文，在文中找出符合解释的单词，完成后请几名学生展示答案，教师点拨。(5分钟)
3．再次认真阅读短文，根据文章内容完成3c中人们对怪异声音的推测，然后请学生展示答案，教师点拨。(3分钟)
4．细心阅读短文，理解每一句话的意思，小组合作解决遇到的疑难问题。教师点拨短文中出现的重点和难点。(5分钟)
5．熟读短文，识记并背诵知识要点。(3分钟)
6．小结训练。(3分钟)
(A)1.They want ( http: / / www.21cnjy.com ) to find ________ useful in the room，but he didn't find ________.
A．something；anything　B．something；something
C．nothing；anything D．everything；nothing
(D)2.—What is behind the door
—There must be a cat ________ behind it.
A．play B．played
C．to play D．playing
(D)3.—Why is he so happy
—He ________ win the English speech contest.
A．can't B．need
C．couldn't D．must
(D)4.—Please wake h ( http: / / www.21cnjy.com )im ________，though he is very ________.Because it's time for breakfast.
A．over；sleeping B．out；sleepy
C．down；sleep D．up；asleep
(B)5.—What happened to you？You look ________.
—I can't find my handbag.There is something important in it.
A．worry B．worried
C．worry about D．worried about
环节说明：通过阅读分析文章，学生的阅读分析能力在这一环节得到提升；小结训练又及时地巩固强化了重要的知识点。
Step 3　问题探究
(　)1.There must be ( http: / / www.21cnjy.com )a worker ________ the rubbish in the street.The street is very clean.
A．collect B．to collect
C．collects D．collecting
答案选择D，本句是there be和情态动词连用表示对某地有某物的推测。there must be的意思是“一定有”所以答案选D。
“There＋情态动词＋be＋sb. doing sth.”表示对“某地有某人正在做某事”的一种推测。
(　)2.We have fun ________ with your sister.
A．talk B．talks
C．to talk D．talking
答案选择D，动词短语have fun＋( ( http: / / www.21cnjy.com )in) doing表示某人在做某事方面有乐趣的意思，省略了介词in，在介词的后面用动名词形式作宾语。
请学生们做前面课时训练部分。
Section A(Grammar Focus－4c)
1．重点单词：laboratory，outdoors，coat，sleepy
2．重点句式：
What did you see that night
I think it might be a bear or a wolf.
She was thinking of taking a shower.
情态动词must，could，might和can't 的用法
情态动词must，could，might和can't 的用法
一、预习课本P60新单词并背诵，完成下面的汉译英。
1．实验室________　　　　2.外套________
3．困倦的________
二、认真预习Grammar Focus－4c找出下列句型。
1．那天晚上你看到什么了？________________________________________________________________________
2．我认为它可能是一头熊或一匹狼。
________________________________________________________________________
3．她正想着要去洗澡。________________________________________________________________________
Step 1　情景导入
Teacher：We have lear ( http: / / www.21cnjy.com )ned how to use “must” to show that you think something is probably true.We also learned how to use “might” or “could” to show that you think something is possibly true and how to use “can't” to show that you think something is not true. Today we are going to do some exercise.
环节说明：开门见山的提出本节课的学习目标——情态动词表示猜测的用法。
Step 2　完成教材Grammar Focus的任务
1．学生大声朗读Grammar Focus的句子。(2分钟)
2．小结训练。(2分钟)
Whose_volleyball_is_this (这是谁的排球？) It_must_be_Carla's.She_loves_volleyball.(它一定是卡拉的，她喜欢排球。)
Whose_hair_band_is_this (这是谁的发带？) It_could_be_Mei's ( http: / / www.21cnjy.com )_hair_band.Or_it_might_belong_to_Linda.They_both_have_long_hair.(它可能是梅的发带。或者它可能属于琳达。她们都有长发。)
What_did_you_see_that_night (那天晚上你看到什么了？) I'm_not_sure，but_i ( http: / / www.21cnjy.com )t_can't_be_a_dog.It_was_bigger.I_think_it_might_be_a_bear_or_a_wolf.(我不确定，但是它不可能是一只狗，它比较大。我认为它可能是一头熊或者一匹狼。)
　　环节说明：通过对Grammar Focus 句型的填空练习能够使学生更好地理解和掌握本单元的重点语法和句型。
Step 3　完成教材4a－4c的任务
1.认真阅读4a中的对话，然后从括号内选择合适的词来补全对话，完成后小组内互相交流答案，教师点拨易错点。(3分钟)
2．两人一组练习4a中的对话，并邀请几组学生表演对话。(3分钟)
3．读4b中的句子，然后推测出现这些情况的原因，完成后小组内互相交流答案。(3分钟)
4．认真观察4c中房间的图片，根据房间的物品及物品摆放，仿照4c的对话形式和你的搭档互相交流各自的看法。
参考案例
A：It could be a girl's room because it's very tidy.
B：I guess so.But it ( http: / / www.21cnjy.com ) might be a boy's room because the clothes look like boys' clothes.
3．小结训练。(3分钟)
(C)1.—There is ( http: / / www.21cnjy.com ) a beautiful blouse on the bed.I think it ________ be a girl's room.
—I think so.
A．may　　　B．can't　　　C．must　　　D．can
(A)2.—Could I play computer games now
—No，you ________.You must help me with the housework first.
A．mustn't B．may not
C．could D．needn't
(C)3.—Is he your English teacher
—No，he ________ be our teacher.The man is much shorter.
A．mustn't B．may not
C．can't D．needn't
环节说明：通过本环节的对话练习及小结训练让学生熟练地掌握了情态动词表示推测的用法。
Step 4　问题探究
(　)1.The pair of shoes ________ yours.It is ________ big for you.
A．must be；too much B．can be；much too
C．can't be；too much D．can't be；much too
答案选择D，本句子是考查情态动词和be连用表示推测的用法，所以由从句的意思理解到much too big表示“太大”的意思。
请学生们做前面课时训练部分。
Section B(1a－1d)
1．重点单词：alien，suit
2．重点词组：run after，in the sky，a woman with a camera，something strange
3．重点句式：
—Why do you think the man is running
—He could be running for exercise.
能够利用情态动词对正在进行的动作进行推测
能够利用情态动词对正在进行的动作进行推测
一、预习课本P61新单词并背诵，完成下面的英汉互译。
1．外星人________　　　　2.西装________
二、认真预习1a－1d找出下列短语和句型。
1．追逐，追赶________________________________________________________________________
2．在空中________________________________________________________________________
3．一个带相机的女人________________________________________________________________________
4．奇怪的事________________________________________________________________________
5．—你认为这个人为什么在跑步？
—他可能是为了锻炼而跑步。
________________________________________________________________________
________________________________________________________________________
Step 1　情景导入
Teacher：A UFO is land ( http: / / www.21cnjy.com )ing.It is coming down from the sky！The terrible，ugly，frightening alien is chasing the two people.The frightened man is looking back at the alien.To know more about the UFO and aliens，let's learn Section B 1a－1d.
环节说明：由听力材料的内容导入新课，引起了学生的学习兴趣，同时为听力做好了铺垫。
Step 2　完成教材1a－1d的任务
1．两人一组互相提问1a方框中的单词。(3分钟)
2．认真观察1a中的图片，根据图片信息，用方框中合适的单词，仿照例句对每幅图片进行描述，完成后小组内互相交流。(3分钟)
3．听第一遍录音，按你听到的顺序给1a中的图片排序，并在横线上写两到三句话来补全故事，然后小组内交流讨论。(4分钟)
4．再认真听一遍录音，完成1c的表格，请学生展示答案，教师点拨。(3分钟)
5．认真听第三遍录音，整体感知对话内容。(4分钟)
6．借助1b和1c中的信息，仿照1d的形式两人一组分角色练习对话。(5分钟)
参考案例
A：Why do you think the man is running
B：He could be running for exercise.
A：No，he's wearing a suit.He might be running to catch a bus to work.
7．小结训练。(3分钟)
(C)1.The bike ________ be Jim's because I saw him riding it this morning.
A．can　 　B．may　 　C．must　 　D．need
(D)2.—Why is the boy running
—He ________ be running to catch up his classmates.
A．can't B．need C．couldn't D．could
(B)3.—Excuse me.Where is the zoo
—Sorry，I don't know.Ask that policeman.He ________ know.
A．shall B．may C．need D．would
(D)4.—Must I finish my homework now
—No，you ________.You may have a rest first.
A．mustn't B．can't
C．may not D．needn't
(B)5.—Difficulties always go with me!
—Cheer up！If God ( http: / / www.21cnjy.com )closes a door in front of you，there ________ be a window opened for you.
A．would B．must D．could D．can
环节说明：通过这个环节提高了学生的听力水平，学到了听力技巧，而且还熟练地掌握了情态动词表示推测的用法。
Step 3　问题探究
(　)1.Our teache ( http: / / www.21cnjy.com )r ________ in his office，because I saw him teaching in Class 5 just now.
A．must be work
B．can be working
C．can't be working
D．mustn't work
答案选择C，本句子是考查“情态动词＋b ( http: / / www.21cnjy.com )e＋doing”的用法，表示推测句子的主语正在做某事的意思。从本句子后面的意思和情景可以判断是用否定形式的推测can't be doing表示句子的主语不可能正在做某事。故选C。
请学生们做前面课时训练部分。
Section B(2a－2e)
1．重点单词：express，ci ( http: / / www.21cnjy.com )rcle，Britain，mystery，receive，historican，leader，midsummer，medical，purpose，prevent，energy，position，burial，honor，ancestor，victory，enemy，period，hard working
2．重点词组：at the same time，，communicate with，point out，a group of
3．重点句式：
They think the stones can prevent illness and keep people healthy
As you walk there， ( http: / / www.21cnjy.com )you can feel the energy from your feet move up your body.
1．重点短语和句型
2．连词用法
1．重点短语和句型
2．连词用法
一、预习课本P62页新单词并背诵，完成下面的汉译英。
1．表达________　　　　2.圆圈________
3．大不列颠________ 4.接受________
5．领导________ 6.仲夏________
7．医疗________ 8.目标________
9．阻止________ 10.精力________
11．位置________ 12.埋葬________
13．尊重________ 14.祖宗________
15．成功________ 16.敌人________
17．时期________ 18.辛勤的________
二、认真预习2a－2e内容找出下列句型。
1．同时；一起________________________________________________________________________
2．和……交流________________________________________________________________________
3．指出________________________________________________________________________
4．一群________________________________________________________________________
5．他们认为石头能阻止疾病，使人健康。
________________________________________________________________________
6．当你走到那里的时候，你能感到能量从脚上移到身体。
________________________________________________________________________
Step 1　情景导入
Teacher：Have you ( http: / / www.21cnjy.com )ever heard of Stonehenge？It's one of the greatest mysteries in the world.Today we will learn an article about it to know more about it.
环节说明：直接引出本课，激起了学生的好奇心，提高了学生的学习兴趣，为本课的学习做好铺垫。
Step 2　完成教材2a－2c的任务
1．认真阅读2a中的单词和词组以及解释，然后将连词或词组和正确的解释匹配。(5分钟)
2．阅读2b短文，将短文中的连词或词组勾画出来，然后小组内互相讨论2a的匹配是否正确。(3分钟)
3．再一次仔细阅读短文，完成2c中的表格，完成后小组内互相交流答案。(3分钟)
4．再次细心阅读短文，理解每一句话的意思，小组合作解决遇到的疑难问题。(3分钟)
5．教师点拨短文中出现的重点和难点。(3分钟)
6．熟读短文，识记并背诵知识要点。(3分钟)
7．小结训练。(3分钟)
(B)1.—Be careful，________ you will cut yourself.
—I will，thank you.
A．and　　　B．or　　　　C．nor　　　D．but
(B)2.He likes basketball，________ he never plays it.
A．and B．but C．or D．to
(B)3.________ the math problem is not difficult，________ few students can work it out.
A．Although；but B．Although；/
C．But；/ D．/；/
(A)4.The boy cried ________ he couldn't find his mother.
A．because B．so
C．or D．because of
(B)5.—I heared someone ________ in the next room.Who is it
—It may be my little sister.
A．sing B．singing C．to sing D．sings
环节说明：通过本环节的学习不仅锻炼了学生的阅读能力，而且通过小结训练让学生对重要知识点进行了巩固练习。
Step 3　完成教材 2d－2e的任务
1.阅读短文，根据短文内容用2a中的连词或词组完成2d中的填空，核对答案后大声朗读句子。(5分钟)
2．你能想起中国或国外的其他的神秘的事物吗？它是关于什么的？在小组内互相交流自己知道的未解的神秘事物。(5分钟)
环节说明：通过这个环节的训练让学生掌握了文章概述的写法，也使学生更好地理解文章。
Step 4　问题探究
(　)1.On June 11 ( http: / / www.21cnjy.com )th，2013，Shenzhou Ⅹ carrying three astronauts ________ into space from the space center in Jiuquan.All the Chinese people are proud of its successful launch.
A．sent up B．are sent up
C．was sent up
答案选择C，由On June 11th, 2 ( http: / / www.21cnjy.com )013可知该句为一般过去时，排除B项；主语Shenzhou Ⅹ与谓语动词存在被动关系，故应用被动语态，故选C。
(　)2.—Someone is knocking at the door.Is it Ann
—It ________ be her.She is giving a performance at the theatre now.
A．may　　B．must　C．can't　D．mustn't
答案选择C, 由答语“她现在在剧院进 ( http: / / www.21cnjy.com )行表演”，说明敲门的一定不是她。may be“可能是”，把握性不大的推测，must be“一定是”，肯定推测， can't be“不可能是”，用于有把握的否定推测。mustn't表示“禁止、一定不”。所以选择答案 C。
(　)3.We can ( http: / / www.21cnjy.com )talk with friends on the Internet ________ it's easier and cheaper.
A．though B．as C．or D．but
答案选择B，as用作连词可以表示原因。句意：我们可以在网上与朋友们聊天是因为它既容易又便宜。
请学生们做前面课时训练部分。
Section B(3a－Self Check)
1．重点词组：mystery
2．重点短语：a bit，at work，right now
3．重点句式：
She's the only one who wears such colorful clothes.
I just talked to her on the phone，and she's at work right now.
熟练掌握情态动词表示推测及连词的用法。
熟练掌握情态动词表示推测及连词的用法。
一、预习课本P63－64页新单词并背诵，完成下面的汉译英。
1．奥秘________
二、认真预习3a－Self Check找出下列短语和句型。
1．一点儿________________________________________________________________________
2．在工作________________________________________________________________________
3．现在________________________________________________________________________
4．她是唯一一个穿彩色衣服的人。
________________________________________________________________________
5．我刚才在电话中和她交谈了，现在她正在工作。
________________________________________________________________________
Step 1　情景导入
Teacher：Hello，everyone ( http: / / www.21cnjy.com ).Today we are going to learn Unit 8，from Section B 3a to Self Check.In this class we will review how to use “must” to show that you think something is true. We also review how to use “might” or “could” to show that you think something is possibly true and how to use “can't” to show that you think something is not true.And we will learn how to write a composition with these words.
环节说明：开门见山地提出本节课的学习目标，简单、直接、明了。
Step 2　完成教材3a－3b
1．读3a中的短文，你认为那个 ( http: / / www.21cnjy.com )声音可能是什么？列出你的观点，然后把3a表格填写完整，然后小组内互相交流看看谁能想出最具想象力的解释。(5分钟)
2．根据报纸的开头，及3b中的提示 ( http: / / www.21cnjy.com )按要求写一篇短文，请一名学生在黑板上板书文章，其余同学完成后小组内互相交流，借鉴好词好段。教师点拨黑板上板书的作文。(10分钟)
参考案例
Last week，in a ( http: / / www.21cnjy.com ) quiet town，something strange happened.People in the town often heard strange noise outside their windows.They tried to solve the problem，but they couldn't find anything strange.So people in the town were feeling uneasy.
We now know what was h ( http: / / www.21cnjy.com )appening in the neighborhood.A director of the local zoo said that three monkeys escaped from the zoo and came to the neighborhood by accident.Maybe they felt excited being free and that's why they made so much noise.
Now the mystery is so ( http: / / www.21cnjy.com )lved.People in the neighborhood now feel quiet and happy again.
环节说明：通过这个教学环节让学生完成了本单元的写作练习，同时锻炼了学生的写作能力。
Step 3　完成教材Self Check的任务
1.认真阅读Shelf Check 1中的 ( http: / / www.21cnjy.com )句子，然后用must, might和can't完成填空，完成后小组内互相交流写的答案。(4分钟)
2．认真读Shelf Check 2中的例句，根据表格中的内容提示写出表示推测的句子，完成后小组内互相交流答案。(3分钟)
环节说明：通过这个环节让学生熟练掌握了情态动词的用法。
Step 4　问题探究
(　)1.—Whose book is this
—It ________ your brother's.Look！His name is on the book.
A．must　　　　　　　　B．can't
C．mustn't be D．must be
答案选择D，本句子是考查情态动 ( http: / / www.21cnjy.com )词表示猜测的用法。从句子的意思和后面句子的情景可以判断是把握性很大的肯定猜测，所以用情态动词must be表示“一定是”的意思。
请学生们做前面课时训练部分。