And then his face changed when the answer occurred to him: a member of the crew.

It was at this point that an answer occurred to Caesar.

The answer occurred to her instantly: It was a matter of evidence.

She knows I can take care of myself- Then the answer occurred to her.

The answer to that question occurred to her even as she spoke.

It was a few moments before an answer occurred to him.

He considered the time frame and a possible answer occurred to him.

When he stopped to think, though, an answer did occur to him.

When no answer occurred to him, he asked, "What about the wood?"

The answer popped into his head the way some lines of poetry occurred to him.