51.____ it not for you， I would walk there.

　　A.If B.Had C.Would D.Were

　　52.I'd rather you _____ anything about it.

　　A.do B.didn't do C.don't D.didn't

　　53.I ___ go there if he goes with me.

　　A.would rather not B.would rather not to C.would not rather D.would not rather to

　　54.But for the heat of the sun， nothing _________.

　　A.can live B.will live C.could live D.has lived

　　55.But for their guidance， we __________________.

　　A.shouldn't succeed B.couldn't have succeed C.will not succeed D.shall not succeed

　　56.If the sun _____ tomorrow， what would we do?

　　A.will not rise B.wouldn't rise C.didn't rise D.doesn't rise

　　57.What should we do if the plane _____ late?

　　A.be B.should be C.were about to be D.would be

　　58.Jack.You are so lazy! This job ___ hours ago.

　　A.should finish B.must have finished C.ought to have been finished D.was about to finish

　　59.His watch _______.I will go and call him.

　　A.must stop B.might stop C.must have stopped D.might have stopped

　　60.I ____ study English than Russian.

　　A.had better B.would like to C.should like to D.would rather

　　61.If you had taken your medicine yesterday， you _______ well now.

　　A.should be B.would have been C.would be D.will be

　　62.____ what ____， I would never have left her alone.

　　A.If I knew， has happened B.If I have known， was going to happen

　　C.Have I known， is going to happen D.Had I known， was going to happen

　　63.The worker demanded that their working conditions ______.

　　A.be improved B.would be improved C.should be improved D.both A and C

　　64.It was ordered that the construction _______ ahead of time.

　　A.is completed B.was completed C.be completed D.must complete

　　65.It was strange that he ____ the following week.

　　A.left B.leaves C.leave D.would leave

　　66.____ there be a flood， what should he done?

　　A.Should B.Had C.Were D.Would

　　67.How nice it ____ if you could stay a bit longer!

　　A.would be B.would have been C.was D.were

　　68.He would have done the work better if he _____ more help.

　　A.had given B.got C.had been given D.could be given

　　69.“Did you go to see the football match yesterday?” “No， I ___ well， but I would have

　　gone if I _______.“

　　A.didn't feel， did B.didn't feel， had C.hadn't felt， did D.hadn't felt， had

　　70.I'll tell Mary about her new job，“ ”You ____ her the other day.“

　　A.ought to tell B.must have told C.would have told D.should have told

　　71.The plant is dead.I ____ it more water.

　　A.will give B.would have given C.must give D.should have given

　　72.I left early last night， but I wish I ____ so early.

　　A.didn't leave B.hadn't left C.haven't left D.couldn't leave

　　73.Do you like Beijing ? Yes， very much.I wish I ____ have to leave so soon.

　　A.didn't B.don't C.won't D.needn't

　　74.Why didn't Jack give you one of his novels?

　　I didn't want one， but he would have given me one if I _____.

　　A.did B.wanted C.had D.had wanted

　　75.____ you fail in the test， you ___ try again.

　　A.Could， can B.Would， would C.Should， should D.If， had better to