You can camp here provided you _____ no mess.
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"What are you doing later this afternoon?" "Oh, _____ the game finishes, I'll go home, I expect.
_____ then what I know today, I would have saved myself a lot of time ad trouble over the years.
If I_____ the same problems you had as a child, I might not have succeeded in life as well as you have.
The lecturer last night didn't know what he was talking about, but if Dr. Mason_____, I would have listed carefully.
The plane I intended to catch crashed and everyone was killed. If I_____ that plane, I would be dead now.
If only I wasn't so fat, I_____ able to get into these trousers.
_____ interested in that subject, I wouldn't try to learn more about it.
"These figures are too complicated to work our in your head". Yes, it________ we had a computer".
I_____ William with me if I had known you and he didn't get along with each other.