Unit6 Electricity语法讲义+语法练习+单元综合检测（含答案）

7B Unit6 Electricity语法讲义
Grammar：情态动词一、情态动词的定义? 情态动词是一种本身有一定的词义,表示说话人的情绪,态度或语气的动词,但不能单独作谓语,?只能和其他动词原形构成谓语。常表示命令、请求、拒绝、义务、可能、需要等。?二、情态动词的特点?1.?情态动词无人称和数的变化,?? 2.?情态动词后面跟的动词需用原形,否定式构成是在情态动词后面加?"not"。 3.?个别情态动词有过去式,?过去式用来表达更客气,?委婉的语气,?时态性不强,?可用于过去，现在。三、情态动词的用法? 1.?can/could；????????can’t/couldn’t?(否定)?1)?表示能力,?意为“能、会”,?例如：? ?如：I?can?speak?a?little?English.????????????我会讲一些英语。????? I?can’t?swim.??我不会游泳。??--?Can?you?ride?a?bike?????--?Yes,?I?can.?/?No,?I?can?t.?你会骑自行车吗？.是的，我会骑???????????????????????? 2)?表示请求或允许，多用于口语中，意为“可以、能”等? ???如：You?can?go?home?now.?你现在可以回家了。?You?can’t?stop?your?car?here.??????你不能把我车停到这里。 我能借你自行车吗？??不，你不能。--?Can?I?borrow?your?bike??????????--?Yes,?you?can.?/?No,?you?can’t.???3)?用于否定句、疑问句中，表示猜测、怀疑或不肯定.? ???如：Lucy?can’t?be?at?home?now,?she?went?to?the?park?just?now.?? Lucy现在不可能在家，她刚刚去了公园。?Where?can?it?be??它可能会在哪里呢？I?can’t?find?my?football.?我不能找到我的足球了。【注意：】? 1）?could?是can的过去式,?有两种用法,?一种表示过去式；一种用来表达更加客气,?委婉的语气,?时态性不强,?可用于过去，现在。? 2）?be?able?to?意为“有能力，能够做...”,?相当于can/could,?但它有人称，数和时态的变化。??2.?may;?????????may?not?(否定)?1)?表示“请求，许可”，此时与?can?同义，可以互换使用? ???May?I?borrow?your?bike?????????????Can?I?borrow?your?bike??????Yes,?you?may.?/?No,?you?may?not.??????Yes,?you?can.?/?No,?you?can’t.?2)?may/might表示不太肯定的猜测，意为“有可能”? 如：Lucy?may?come?to?school?late?today.? It?might?rain?today.? 【注意】：might?是may?的过去式,?有两种用法,?一种表示过去式，一种表示更加委婉,?客气的语气或对可能性的怀疑。3.?must;???????????mustn’t?(否定)?1)?must(“必须”,?表示命令)，mustn’t(“一定不能”,?表示强烈禁止...)???? 如：You?must?go?to?bed?before?22:00pm.?你必须在晚上10点前上床睡觉。 You?mustn’t?play?with?fire.?It?s?dangerous!?你禁止玩火，那很危险。--Must?I?write?down?the?sentences？??????我必须写下这些句子吗？ --No，you?needn’t.??(--No,you?don’t?have?to)?注意： 1)在回答must的疑问句中，否定回答用needn’t或don’t?have?to表示“不必”，不用mustn’t? 2)?must?还可以表示非常肯定的猜测，意为“一定”?如：The?girl?in?a?red?skirt?must?be?Lucy.??3)?must/?have?to?的区别：?①.?must表示必须，强调主观上的愿望；have?to表示“不得不”，强调客观需要????如：You?must?go?be?bed?before?22:00pm.??? ?My?bike?is?broken,?so?I?have?to?go?to?school?on?foot.?②.?have?to?有人称、数、时态的变化；must则没有。? 如：用have to 正确形式填空。I?have?to?clean?the?classroom?today.????She?has?to?finish?her?homework?first.? It?was?late,?he?had?to?go?to?school?without?breakfast.?语法专练：一．用适当的情态动词填空：1.__________you?swim?? 2.We?___________operate?the?machine?last?week,?but?we?can?operate?it?now.3.Don’t?worry.?You?_____?return?me?this?book?tomorrow.?4.He?said?if?he?_________ask?me?another?question.5.My?grandma?is?ill.?You?_____?talk?so?loudly?here?.? 6.I?can’t?play?with?you.?I?__________finish?my?homework?first.7.I__________?get?up?early?tomorrow.? 8.______________you?please?open?the?window???9.Nobody?___________live?without?air.? 10._________he?speak?Chinese??Yes?,a?little.? 11.?The?book?_________?be?returned?before?Saturday.?12.__________I?come?in??Yes?,please.? 13.?You?________give?up?smoking?at?once.?It’s?bad????for?your?eyes.? 14.?Excuse?me?._________I?ask?you?a?question??15.?__________you?tell?me?where?the?station?is??? 16.?______?I?finish?the?work?now???No,?you?_________.????You?_____???????do?it?this?evening.? 17.?May?I?use?your?e-dictionary???Sorry?,?you?_________.?????I?am?using?it?now?.? 18.?Look?at?the?ground?.It’s?very?wet?.It?_______?????have?rained?last?night答案：1.can?2.couldn’t?3.may?4.could?5.can’t?6.must?7.must?8.could????9.can?10.Can??11.must?12.Can/May??13.must?14.May/Can????15.Can/Could??16.Must,needn’t,can/may?17.can’t?18.must二．单选：1.?(??????)?----May?I?borrow?your?books????--?--Yes,?you?______???????.? A.?may???B.?can???C.?must??D.?need? 2.?(??????)??---Can?he?speak?English?? ?----________.? A?.Yes,?he?does???????B.Yes,he?did??????C.?Yes,?he?can????D.Yes,?he?must?? ?(??????)??----_______?I?swim?here???????? ----I’m?sorry.?Children?_____?swim?alone?here.? A.Must;?can?t??????B.?May;?must??????C.?Can;?mustn’t????D.?Can’t;?can? 4.?(??????)?With?the?help?of?the?new?technology,?you?_____?e-mail?your?friends?by?mobile?phone.?? A.can???????B.?must??????C.?need?????D.?should?? 5.?(??????)?----Can?I?go?fishing?with?you,?Dad?? ? -----No,?you?_____.?You?______?stay?at?home?and?do?your?homework. ?A.won’t;?may???? B.?can’t;?must????? C.?shouldn’t?;?ought???? D.?needn’t;?should? 6.?(??????)?Thomas,?please?be?quiet.?The?others?_____?hear?very?well.???????? ?A.?can’t????? B.?mustn’t????? C.shouldn’t????? D.?needn’t?7.?(??????)?It’s?very?warm?today.?You?____?wear?the?coat.? ???????? ??A.?must???? B.?don’t?have?to?????? C.?have?to???? D.?mustn’t?8.?(??????)?Look?at?that?man?over?there.???????he?be?our?teacher?Mr.Luo?? --He????????be?him.?He?has?gone?to?Beijing.? A.May;must??? B.Can;may??? C.Can;can’t??? D.May;can’t? 9.(??????)?You?_____?talk?loudly?in?the?library.? ?????????? A.?don’t???? B.?mustn’t????? C.?needn’t????? D.?don’t?have?to?10.(??????)?_____?climb?that?tall?tree?? ? A.Do?you?need???? B.Are?you?need?? C.Need??you?? D.Need?you?to? ?11.(??????)____I??go?and?apologize?to?my?teacher?for?my?mistake?? ? A.?Should??? B.Need?? C.Can?? D.?May?? 12.(??????)?They?_____?do?well?in?the?exam.? ????????? A.?can?be?able?to?????B.?be?able?to?????C.?are?able?to????D.?am?able?to?13.(??????)?Must?I?return?the?magazine?to?you?right?now,?Sandy?? ????????? ?No,?you?______.?You?_____?keep?it?until?next?Wednesday.? ????????? A.?mustn’t;?may???? B.?needn’t;?must???? C.?needn’t;?can?????D.?can’t;?may? 14.(??????)John____?come?to?see?us?tonight,?but?he?isn’t?very?sure?yet.?????????? ?A.may?? B.can?? C.has?to? ?D.must??15.(??????)----Is?Tom?at?home?now?? ----He???????be?at?home?now.?Because?I???????his?room?just?now??and?he?answered.? A.must;called?? B.can’t;phone?? C.may;called?? D.must;phoned??????????单元综合检测： II.?单项选择。（共15小题，每小题1分）? A)从下面每小题的A、B、C、D四个选项中选出可以替代划线部分的最佳选项。 ?(? ? )?16.?I?asked?her?some?questions,?but?she?only?replied?with?a?smile.?A.?worked???????????B.?Asked?????????????C.?left???????????????D.?answered?(? ?)?17.?It’s?time?to?put?away?those?foolish?ideas.? A.?polite?????????????B.?silly??? C.?funny??????????????D.?different??????? (?? )?18.?Please?turn?on?the?radio.?I’d?like?to?listen?to?some?music.?A.?switch?on??????????B.?give?back??????????C.?discuss?about????????D.?forget?about? (?? )?19.?Don’t?play?with?matches?(火柴).?It?may?start?a?fire.A.?make?a?mistake???????B.?stop?a?fire?????????C.?ask?a?question?????????D.?cause?a?fire?(?? )?20.?Close?the?windows?please.?The?air?conditioner?is?on.A.?The?air?conditioner?is?broken.????????? B.?The?air?conditioner?is?studying.?????C.?The?air?conditioner?is?working.?? D.?The?air?conditioner?is?turning.?16-20?DBADC??B)从下面每小题的A、B、C、D四个选项中选出可以填入空白处的最佳选项。 ?(?? )?21.?---?Your?mother?will?be?very?angry?if?she?____?the?mess. ?????---?I?know?I?will?____?the?room?before?she?arrives.? ??????A.?will?see;?tidy?up????? B.?sees;?tidy?up?????? C.?will?see;?dry?up????? D.?sees;?dry?up?(?? )?22.?---?_____?I?play?computer?games?for?another?ten?minutes,?Mum?????????---?No,?you?____.?It?is?bad?for?your?eyes.???????A.?May;?needn’t?????? B.?Must;?needn’t? ??C.?May;?can’t?????? D.?Must;?can’t? (?? )?23.?---?Don’t?_____?it.?It?breaks?easily.????????---?Please!?I?will?be?very?_____?I?want?to?have?a?close?look?at?it.???????A.?touch;?modern??????? ?B.?leave;?modem?? C.?touch;?careful???????D.?leave;?careful? (??)?24.?---?_____?I?go?to?the?movies,?Mum??????---?Certainly?But?you?_____?be?back?before?ten?o’clock.???????A.?Mustn’t;?mustn’t?????B.?Can’t;?mustn’t?????C.?Must;?must????????D.?Can;?must?(??)?25.?---?Water?____?electricity.????????---?Yeah.?They?____?make?our?life?better.???????A.?is?like;?both??????B.?looks?like;?both?????????C.?is?like;?all???????D.?looks?like;?all?(??)?26.?---?_____?I?ask?you?some?questions?about?April?Fool’s?Day?????????---?Sure.?I’d?like?to?play?a?trick?on?my?classmates?____?that?day.???????A.?May;?at???????????B.?Must;?at?????????????C.?Must;?on?????????????D.?May;?on?(??)?27.?---?The?newspaper?_____?us______?all?the?information?we?need.????????---?Yeah.?It?is?very?useful.????A.?provides;?with???????B.?protect;?with?????????C.?provides;?for?????????D.?protect;?from?(??)?28.?---?The?work?is?too?hard?for?me.?I?____?finish?it?on?time.???????---?_____!?I?can?help?you.? A.?can’t;?Don’t?worry???????B.?mustn’t;?Don’t?worry????C.?can’t;?All?the?way???D.?mustn’t;?All?the?way?(??)?29.?---?_____?I?take?some?photos?in?the?hall????????---?No,?you?_____.?Look?at?the?sign?“No?Photos”!? A.?Can;?needn’t????????B.?Must;?mustn’t???????C.?Could;?won’t???????D.?May;?mustn’t?(??)?30.?---?____?I?get?you?a?drink?????????????---Yes?______.?A.?May;?thanks??????B.?May;?never?mind???????C.?Must;?thanks?????D.?Must;?never?mind?21-25?BCCDA? 26-30?DAADAIII.?完形填空。（共1?0分）?Tyler?rode?his?bike?to?a?park.?The?park?was?just?down?the?street.?The?park?looked?pretty?__31__.?There?were?many?people?there.?Some?kids?were?playing?and?some?kids?were__32__?rubbish.????Tyler?__33__?his?bike.?One?"of?the?kids?was?Lauren,?a?girl?from?his?school.?She?saw?Tyler.?"We're?cleaning?up?the?park?today,"?she?said.?"Want?to__34__?"????"No,?thanks,"?Tyler?said.?Today?was?Saturday,?a?day?off.?He?came?to?the?park?to?have?__35__,?not?to?work!????Tyler?rode?his?bike?around?the?path.?He?passed?the?swings(秋千).?He?passed?the?small?river.?As?he?rode, ?he?__36__?things?he?never?noticed?(注意)before.?There?was?lots?of?rubbish on?the?ground.?Tyler?rode?back?to Lauren:?He?got?off?his?bike.??????"I’ll?__37__,"?he?said.??????“Here,”?Tyler?said,?and?she__38__?him?a?bag.?Tyler?and?the?kids?cleaned?for?about?an?hour.??????When?they?finished?the?work,?the?park?looked?__39__.?Tyler?rode?his?bike?around?the?path?again.?Tyler?__40?__.?Now?the?park?was?better?than?ever!? (??)?31.?A.?quiet???????????? B.?crowded????????? C.?simple??????????? D.?terrible?(??)?32.?A.?talking?about?????? B.?knocking?at????? ?C.?picking?up???????? D.?growing?up?(??)?33.?A.?sold?????????????? B.?protected?? C.?returned?????????? D.?stopped?(??)?34.?A.?help??????????????? B.?throw?????????? C.?watch?????? D.?wait?(??)?35.?A.?money???? ??B.?fun??????????? C.?luck?????? D.?water(??)?36.?A.?saw?????????? B.?heard???????? ?C.?knew??????? D.?smelt?(??)?37.?A.?go??????????? ?B.?help????????? ?C.?buy???? ?D.?leave?(??)?38.?A.?gave???????????????B.?imagined???? C.?produced?????????? D.?returned?(??)?39.?A.?ugly????????????? B.?noisy?? C.?great???? D.?cold? (??)?40.?A.?changed?????????????B.?worried?? C.?cried?????????????? D.?smiled?31-35?BCDAB??36-40?ABACD?V.?阅读理解。（25分）?A????Alex?was?eating?his?breakfast?one?morning.?Outside,?his?dog,?Tiki,?began?to?bark.?He?went?outside.?He?saw?something?moving?behind?the?bush?(灌木丛).?He?pushed?the?branches?aside.?A?little?man?stood?there. ?He?wore?a?yellow?spacesuit.?He?had?a?big,?round?head.??????"Please?do?not?hurt?me,"?the?little?man?said.?"Okay,"?said?Alex.?For?some?reasons,?he?did?not?feel?afraid.?"Are?you?from?outer?space?"?said?Alex.????The?man?nodded?and?said,?"Yes.?My?name?is?Bort.?I?come?from?another?planet.?My?spaceship?is?not?working.?I?need?help. ?????"What?do?you?need?"?Alex?asked.?Bort?said,?"You?have?a?lot?here?on?the?Earth.?I?believe?you?call?it?electricity.?You?can?put?it?in?my?bottle."?He?gave?a?bottle?to?Alex.?Alex?opened?the?empty?bottle.?"But?we?can't?put?electricity?in-?bottles.?We?have?batteries,"?Alex?said.?"Then?you?can?give?me?your?batteries,"?said?Bort.?"How?many?do?you?need?"?Alex?asked.? "A?lot,"?said?Bort.?"It?is?a?very?big?spaceship."?(? ?)?41.?When?did?the?story?happen?? A.?In?the?morning.????? B.?In?the?afternoon.?????? ?C.?In?the?evening.?????? ?D.?At?noon.(?? )?42.?What?did?Bort?look?like?? A.?He?was?very?tall.???? B.?He?had?a?small?head.??? ?C.?He?had?a?round?head.???? D.?He?wore?green?clothes(?? )?43.?Why?did?Bort?come?to?Alex's?house?? A.?He?needed?help.???????????????? B.?He?needed?a?friend.?????C.?He?wanted?to?have?fun.? D.?He?wanted?to?know?more?about?Alex.?(??)?44.?Which?of?the?following?did?Bort?need'?? A.?Gas.???????????? B.?Electricity.?? ?C.?Water.????????????????D.?Food.?(??)?45.?How?did?Bort?come?to?the?Earth?? A.?By?car.?????????? B.?By?plane.? C.?By?spaceship.???????????D.?By?bike.?41-45?ACABC??BSummer?is?just?around?the?corner.?It?starts?on?June?21st.?For?most?kids,?that?means?more?time?to?play?outside?and?have?fun.?Follow?these?tips?to?make?sure?you?stay?safe?when?you?are?enjoying?the?season.?Sun?safety????Many?kids?will?spend?hours?playing?outside?in?the?summer?sun.?But?be?careful.?The?harmful?rays?(光线)? of?the?sun?can?cause?damage?to?your?eyes.?If?you?are?out?in?the?sun,?be?sure?to?wear?sunscreen?(防晒油).?You?should?also?wear?a?hat?and?sunglasses?that?protect?against?the?harmful?rays.??Make?sure?you?follow?water?safety?rules.?Always?swim?with?an?adult?watching?you.?If?you?don't?know?how?to?swim,?you?can?take?lessons.?Rules?about?biking?and?skating??????Biking?and?skating?are?good?ways?to?exercise.?To?stay?safe,?always?wear?a?helmet?(头盔). ?It?protects?your?head?if?you?fall?down? ( ?)?46.?In?summer,?most?kids?will_________.? A.?spend?more?time?staying?at?home??????? B.?spend?more?time?playing?outside?????????C.?have?fun?with?their?teachers? D.?have?fun?in?their?classes? (?? )?47.?What?does?the?underlined?word?"damage"?mean?? A.?Harm.?????????? B.?Light.????????? C.?Attention.???????????? D.?Fire.?(? ?)?48.?Which?of?the?following?can?NOT?stop?kids?from?the?harmful?rays?of?the?sun??????A.?Wearing?a?hat.??????????? B.?Wearing?sunglasses.?????C.?Wearing?sunscreen.??????? D.?Wearing?fewer?clothes.? ( ??)?49.?Which?of?the?following?can?be?put?into?the?blank?A.?Swimming?lessons.??? ?B.?Rules?at?home.??????? C.?Water?rules.??????? D.?Rules?at?school.???(? ?)?50.?The?writer?wrote?the?passage?to__________.????? ?A.?show?us?how?to?have?more?fu??????? ?B.?encourage?us?to?swim??????C.?teach?us?how?to?play?games?????????? D.?tell?us?some?safety?tips??46-50?BADCD??C?????Most?cars?run?on?gas.?Gas?cars?work?very?well.?But?there?is?a?problem.?Cars?that?run?on?gas?make?the?air?dirty.?The?dirty?air?is?not?good?for?people;?animals?or?trees.?Gas?cars?make?the?air?dirty?for?all?living?things.?What?can?we?do??We?can?drive?electric?cars! ?????Electric?cars?do?not?use?gas.?These?cars?do?not?make?the?air?dirty.?These?cars?have?batteries?that?power?their?motors?(马达).?The?batteries?can?be?charged?(充电)?many?times.?They?can?be?used?again?and?again.? This?makes?electric?cars?great.? ?????But?electric?cars?have?problems?too.?They?are?slower?than?gas?cars.?They?are?also?very?quiet.?This?means?that?some?people?can't?hear?them?when?they?go?by.?They?may?not?think?a?car?is?coming.?So?they?have?to?be?careful.??????People?are?finding?ways?to?make?electric?cars?better?all?the?time.?Maybe?one?day?all?cars?will?be?electric.?That?would?be?much?better?for?the?world.? (?? )?51.?What's?the?problem?of?the?cars?that?run?on?gas??A.?They?are?too?big.????? B.?They?are?noisy.???? C.?They?are?too?small.??? ?D.?They?make?the?air?dirty. (?? )?52.?What?does?the?underlined?word?"they"?refer?to(指代)??A.?Gas?cars.?????????? ?B.?Some?people.??? ???C.?Electric?cars.????????? D.?The?batteries.?(?? )?53.?Why?do?people?have?to?be?careful?about?electric?cars?? A.?Because?they?are?quiet.?????? B.?Because?they?are?fast.?????C.?Because?they?are?too?big.????? D.?Because?they?make?the?air?dirty.?(?? )?54.?The?writer?hopes?_______.? A.?no?cars?will?be?electric???????? B.?gas?cars?can?become?better?????C.?all?cars?will?be?electric???????? D.?gas?cars?can?become?slower?(?? )?55.?What's?the?best?title?for?the?passage?? A.?The?problems?of?gas?cars.??????????? B.?People?who?study?cars.????????C.?The?problems?of?electric?cars.???????? D.?Gas?cars?and?electric?cars?51-55?DBACD???DAlex?is?a?very?special?boy?who?really?likes?trees.?He?loves?going?camping?in?the?forest.????Alex?has?a?little?sister?called?Julia.?She?also?likes?going?outdoors,?especially?going?on?trips?to?the?snowy?mountains?with?their?parents.????One?day,?their?parents?decided?to?take?them?on?holiday?and?let?them?choose?between?camping?and?skiing.?Alex quickly?shouted?out,?"Camping?in?the?forest!"?However,?Julia?cried,?"Snow,?snow,?snow!"????"Why?did?you?choose?to?camp,?Alex?"?their?parents?asked?him.?He?shouted,?"It's?fun?and?exciting."?His?parents?let?him?consider?it?again?because?they?also?wanted?to?listen?to?Julia's?idea.????Just?then,?Julia?said?to?her?brother,?"Alex,?we?could?go?to?the?mountain?to?see?the?snow,?but?make?sure?it's?somewhere?with?a?forest.?What?about?that?"????Certainly,?the?idea?sounded?great?to?both?Alex?and?Julia.?And?in?the?end,?the?whole?family?happily?went?to?a?snowy?mountain?where?there?was?a?forest.? (?? )?56.?The?passage?tells?us?that?Alex?and?Julia's?parents?________.???????A.?like?Alex?more????????B.?like?Julia?more?????C.?are?fair?to?both?of?them??????D.?don't?love?them?(? ?)?57.?What?did?the?family?do?in?the?end????????A.?They?only?went?camping.?????? ?B.?They?only?went?skiing.???????C.?They?went?to?a?forest?with?snow?in?it.???????D.?They?went?to?a?mountain?with?a?forest?and?snow.? (? ?)?58.?The?underlined?word?"consider"?might?mean?________?in?English.????????????A.?look?at????????????????B.?think?about??????C.?wait?for??????????D.?listen?to?(?? )?59.?Which?of?the?following?is?NOT?true?according?to?the?passage????????A.?There?are?four?people?in?the?family.???????B.?Julia?thought?of?her?brother?when?she?answered.???????C.?The?parents?didn't?agree?with?Alex's?or?Julia's?idea.???????D.?Alex?thought?going?camping?was?fun?and?exciting.?(?? )?60.?From?the?passage,?we?know?________.? ?56-60?CDBCA??????A.?Julia?is?a?polite?girl???????????????? B.?Alex?doesn't?love?camping???????C.?Alex?doesn't?like?his?sister?Julia?????? D.?Julia?might?be?angry?with?her?parents?VII.?书面表达。 ???请根据下面的提示写一篇60词左右的安全用电手册。?提示：?1．我们手湿时，不允许触碰电器；? 2．电器不能工作时间太长，我们应该让它们停止工作，休息一下； ?3．不能让小孩触碰到一些电器，比如微波炉等；? 4．当我们清洁或者修理电器时，一定要先拔掉电源。? (electrical?appliances?电器，touch触碰，microwaves微波炉，repair修理?)? ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? VII.?(One?possible?version)? When?we?use?the?electrical?appliances,?we?must?be?careful?with?them.?First,?if?our?hands?are?wet,?we?mustn’t?touch?them.?Second,?the?electrical?appliances?can’t?work?too?long?and?we?should?make?them?stop?to?have?a?rest.?Third,?we?mustn’t?let?children?touch?some?of?the?electrical?appliances,?such?as?microwaves?and?so?on.? Last,?when?we?clean?or?repair?the?electrical?appliances,?we?must?cut?off?the?electricity.? 【书面表达写作指导】? 本次书面表达要求写关于用电安全的短文。写作时要注意以下几点：?? ?1.?确定时态，应使用一般现在时进行写作；? 2.?书写正文时，要围绕提示展开内容，按顺序可用first,?second,?third,?...?来分层次写，不能遗漏要点； ?3.?注意本单元的语法句型?以及情态动词must?和can?的用法； ?4.?文章完成之后，要通读全文，检查语法是否正确, 要点是否齐全???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????