He seemed to think it was the only explanation needed.
It was the only possible explanation for what had happened.
The only explanation is the head coach and his staff.
"One which could well be the only explanation for the current course of events."
A test was the only explanation he could think of.
The only explanation which can be given, he says, seems to me to result from the experience known to all the world.
Why, it was the only explanation I could think of.
His only explanation was that the time seemed like much more than three hours to him.
It was the only explanation for the way she felt.
He said the only explanation of this was given by the boy to his five year old brother.