_____ you obeyed orders, this disaster would not have happened.

If I_____ the same problems you had as a child, I might not have succeeded in life as well as you have.

The car broke down. But for that we _____ in time.

You can camp here provided you _____ no mess.

We must be early or else we_____ a seat.

The lecturer last night didn't know what he was talking about, but if Dr. Mason_____, I would have listed carefully.

I_____ William with me if I had known you and he didn't get along with each other.

"These figures are too complicated to work our in your head". Yes, it________ we had a computer".

_____ then what I know today, I would have saved myself a lot of time ad trouble over the years.

If I had take his advice, _____ now.

"What are you doing later this afternoon?" "Oh, _____ the game finishes, I'll go home, I expect.

The plane I intended to catch crashed and everyone was killed. If I_____ that plane, I would be dead now.

If he _____ to me, I can't help him.

_____ interested in that subject, I wouldn't try to learn more about it.

_____more help, I could call my neighbor.

I_____ you sooner had someone told me you were in the hospital.