【avoided】15.Heavoidedtheaccidentifhehadbeenmorecareful.A.musthaveB....

15.He avoided the accident if he had been more careful.A.must have B.can have C.could have D.may have16.The clerk I thought would be our new head has resigned.A.whom B.whoever C.who D.of whom17.I’ll appreciate from you soon.A.hear B.hearing C.to hear D.to have heard18.I’d he did it,because he is much more specialized in this field.A.rather B.better C.best D.further19.-- I really want to go there by train.-- Why not there by airplane for a change.A.to go B.going C.go D.went20.The ground is so wet.It yesterday.A.may rain B.can have rainedC.should rain D.must have rained21.Not until I told him that he was wrong.A.did he know B.did he knewB.that he know D.when he knew22.This regulation is something everybody has to .A.go on B.go by B.go about D.go with23.It’s about time you two smoking.A.give up B.to give up B.giving up D.gave up24. a little earlier,we would have been caught in the rain.A.Had we not left B.Have we not left B.If we have not D.Had not we25.Only in this way find a solution to the problem.A.you can B.you may C.can you D.may you 26.An old friend of mine, I intended to invite to e to our school,has e by himself.A.whom B.who C.that D.which27.I have never seen him before,but I do wish I to talk to him right now.A.can B.could C.was able D.were able28.Nowhere else fabric materials at such a low price.A.you can fine B.you could find C.can you find D.could you find29.In some schools children enjoyed free milk until 1970 when the government suddenly this benefit.A.presented B.informed C.expected D.abolished 30.It is estimated that the disarstrous effect by polluted water will last for a long time.A.causing B.caused C.to cause D.will cause 英语