Many a student ____ in the exam. A: have failed B: had been failed C: has failed D: will be failed

Had they not helped us, our experiment _______________. A: had failed B: would have failed C: failed D: have failed

If I had not studied hard, I ______ in the exam. A: had failed B: would failed C: would have failed D: have failed

______, the man would not give in. A: Though had been failed B: Though having been failed C: Though failed D: Though being failed

I’m surprised that he _______ in the match. A: should fail B: should have failed C: would have failed D: may have failed

_____several times the young scientist still kept on making his experiments． A: Having been failed B: Having failed C: Though failed D: Because of failure

Without your advice, I ______. A: fail B: fails C: failed D: would have failed

Thank you for giving me a hand. I ______ in the experiment without your valuable help. A: have failed B: will fail C: would have failed D: must have failed

He failed to

I’m glad I went over all my notes; otherwise _____. A: I may have failed B: I’d fail C: I’d have failed D: I’ll have failed