Dr. X continued to ponder the matter for a minute or so.

He has kept to his room since to ponder the matter over.

And he passed out, leaving his senior to ponder the matter alone.

Sitting there awaiting his return, I tried to ponder the matter reasonably.

Then he turned and walked off, leaving Tay to ponder the matter alone.

You had better ponder the matter well before you decide.

His Majesty was sure to ponder the matter well, if that had been all.

But perhaps he will be back soon, she added, seeming to ponder the matter.

I implore your Majesty to ponder the matter well, and not to defer the remedy.

It would be well to ponder the matter further.

I had not yet had sufficient time to ponder the matter and all that it implied.

But the Illustrious seemed to ponder the matter.

Again the ranger paused to ponder the matter.

I want you to ponder the matter without any constraints, regardless of what I think or believe.

He did not ponder the matter long.

He seemed to ponder the matter.