成人英语三级

51.______fouryearssinceJohnleftschool.

A.Itwas

B.Thoseare

C.Itis

D.Theyhavebeen

52.BythetimeJuangetshome,hisaunt_____forPuertoRico.

A.willleave

B.leaves

C.willhaveleft

D.left

53.“Thisisaterriblyheavybox.”

“　_____　helpyoutocarryit.”

A.Iamto 　

B.Iwill

C.I 　

D.Iamgoingto

54．Allthemachines　_____bytheendofthefollowingweek.

A.wererepaired　

B.willberepaired

C.havebeenrepaired　

D.willhavebeenrepaired

55．Theybelievedthatbyusingcomputerstheproductionoftheirfactory_____.

A.willgreatlyincrease

B.wouldgreatlyincrease

C.hasgreatlyincreased

D.wouldbegreatlyincreased

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