1.  It would be impossible for him to leave hospital tomorrow if he _________ first aid when the accident happened.

     A. hadn’t been given                     B. wasn’t be given

     C. shouldn’t be given                    D. wouldn’t be given

 2.  Jack can’t have arrived, otherwise he _______ me.

     A. would have telephoned                B. would telephone

     C. must have telephoned                 D. should have telephoned

 3.  A few minutes earlier and we ________ the train.

     A. have caught      B. had caught       C. could have caught    D. were to caught