42.What about _________ to the concert with us ?
A.we goB.we goingC.going D.to go
43.__________ clean is a safeguard against disease.
A.To be keeping B.KeptC.KeepD.Keeping
44.Seeing is _________.A.to believeB.believingC.believedD.being believed
45.The heart keeps __________ all the time.
A.to beatB.beatingC.beatenD.to have been beating
46.The microscope is used for _______minute(微小的) objects.
A.examiningB.being examedC.examined D.examine
47.It is no use ________ without thorough _____________.
A.to read; understood B.reading; understandingC.to read; understandD.read; to understand48.Many people enjoy ____________ majiang(麻将).
A.playing B.playing theC.to playD.to play the
49.I am sorry for _______you so much trouble. A.givingB.givenC.having given D.to given
50.Some foods are eaten without ____________.
A.well absorbing B.being well absorbed C.absorbing D.well absorbed
51.Articles(物品) used by patients must be disinfected(消毒) before ___________ others. A.using B.being used by C.used by D.being using
52.Mike has got used _________ up late at night. (stay up)
A.to sitB.X C.to sitting D.sitting
53.Once the heart stops __________,death follows at once.
A.beating B.to beatC.being beatenD.to be beating
54.Mr Taylor went on _________ in spite of illness.
A.to work B.workedC.workingD.to be working
55.We are now busy _________ for the examination.
A.to prepareB.preparing C.preparedD.being prepared
56.I am looking forward __________ from you soon.
A.to hearB.of hearing C.hearingD.to hearing
57.I remembered ________ this person somewhere before.
A.seeingB.having been seenC.seenD.to see
58.I regret __________ that to her.A.having saidB.to have saidC.to say D.X
59.The patient must be separated to avoid(避免) _______ others.
A.being infected(感染)B.infectingC.to infect D.infected
60.After operation the patient\'s condition,farfrom________, became worse than before. A.improvingB.being improvedC.having been improvedD.improved
61.The child thanked the passer-by for _________ his life.
A.savingB.being savedC.having saved D.having been saved
62.Mme Curie was well-known for ______________.
A.winning B.being wonC.being winningD.having won
63.This X-ray machine needs ______________. A
.repairingB.to repairC.repairedD.being repaired
64.Your clothes need ______________.
A.washed B.to be washed C.to wash D.being washed
65.This bike is not worthy ___________.
A.to be repairedB.of repairingC.to repair D.repairing
66.________ provides us with essential nutrients(营养),while ________provides us with oxygen.
A.To eat; breathingB.Eating; to breathe C.Eating; breathing D.Eaten; breathed
67.He attended the party without _______________.
A.invitedB.invitingC.having invitedD.being invited
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