1、【跟踪练习】( D )1.Can you go swimming with us this afternoon?Sorry，I cant.I _ take care of my little sister at home because my mother is ill.Acan BmayCwould Dhave to( C )2.May I go to the cinema，Mum? Certainly.But you _ be back by 11 oclock.Acan BmayCmust Dneed( B )3.To make our city more beautiful，rubbi
2、sh _ into the river.Aneednt be thrownBmustnt be thrownCcant throwDmay not throw( C )4.Who is the man over there? Is it Mr.Li? No，it _ be him.Mr.Li is much taller.Amustnt Bmay notCcant Dneednt( D )5.These books _ out of the reading room.You have to read them here.Acant take Bmust be takenCcan take Dm
3、ustnt be taken( B )6.The boy said he had to speak English in class，but he _ speak it after class.Acould Bdidnt have toCmight Dshouldnt( D )7.Must we hand in the papers now? No，you _.Acant Bmay notCmustnt Dneednt( D )8.John _ go there with us tonight，but he isnt very sure about it.Amust BcanCwill Dma
4、y( A )9.A computer _ think for itself.It must be told what to do.Acant BmustntCmay not Dmight not( C )10.Could I borrow your dictionary? Yes， of course you _.Amight BwillCcan Dshould( B )11.Michael _ be a policeman，for hes much too short.Aneednt BcantCshould Dmay( A )12._ I know your name?AMay BWill
5、CShall DMust( D )13._ you be happy!AMight BMustCWish DMay( D )14.The matter _ be changed into a gas，but it _ be heated to its boiling point.Amay；neednt Bmay ； canCmustnt；neednt Dcan；must( D )15.Cars and buses _ stop when the traffic lights turn red.Acan BneedCmay Dmust( B )16.May I have an apple，Mum
6、?Certainly.But you _ wash your hands first.Amay BmustCcan Dneed( C )17.Shall I tell John about the bad news?No，you _.I think that will make him sad.Aneednt BwouldntCshouldnt Dmustnt( C )18.Could I call you by your first name? Yes， you _.Awill BcouldCcan Dmight( B )19._ the man there be our new teach
7、er? He _ be，but Im not sure.AMay；mustnt BCan；mayCMust ；cant DCan；cant( A )20.Someone is knocking at the door.Who _ it be?It _ be Tom.He is still in the school.Acan；cant Bcan；mustntCmight；could Dmight；may( C )21.Your window needs _；youd better have it _ this week.Acleaning ；doBto be cleaned；doCcleaning；doneDbeing cleaned；done
