I’m not feeling very well, Barton. To tell you the truth, I’m tired of the present life.– I suggest you do some ____ exercise to keep fit.

I like playing _____ football and he likes playing ____piano.

I’ve come to the point_____ I can’t stand her arguing any longer.

He is recovering now is no need to call in a doctor

John didn’t come along, ______ making it necessary for us to get someone else to replace him.