D.will make

17.It’s high time you.

A.start to work

B.would start to work

C.started to work

D.had started to work

18.We required that the machine parts cast iron.

A.is made of

B.be made from

C.be made of

D.is made by

19.I wish our teacher to give another test.I haven’t got prepared yet.

A.isn’t going

B.weren’t going

C.will not going

D.could have gone

20.If I in the twenty-first century,I my vacation in a very different way.

A.should live…would spend

B.will live….should spend

C.are living…should have spent

D.will be living…would have spent

21.,we could not have finished the work on time.

A.If they do not help us

B.Was it not for their help

C.Should they offer to help us

D.But for their help

22.“Did yogo to see the football match yesterday?”

“No.I didn’t fee l well,but I would have gone if I.”

A.did

B.have

C.would

D.had

23.The driver looked over the engine carefully lest it on the way.

A.goes wrong

B.go wrong

C.went wrong

D.would go wrong

24.But for your advice,I into trouble.

A.would get

B.got