I can't offer an explanation as to where they are.

No explanation has ever been offered as to the cause of his death.

Little or no explanation of my return had been offered to anyone.

He offered no further explanation and said nothing of the King's death.

He offered an explanation to the way of making small talk.

When I was finished, she could offer no explanation of what he might be doing.

But this would by no means offer a complete explanation.

The letter does not offer an explanation for the judge's decision.

In some cases, however, explanations have been offered for this.

If an explanation is offered, well and good, but usually she doesn't think it necessary.