The other doctor had frowned and this one was looking at him now as though he were angry.

The doctor stared at the results for a moment, repeated the display, and frowned.

The doctor looked up from his bottles of antibiotics, and frowned.

The doctor frowned, not sure whether or not to believe him.

The doctor frowned at the sight of several other horses tied up hi front.

Then the doctor frowned at Peter, suddenly realizing he was present.

The doctor frowned at the prospect, but she knew her duty.

The doctor finally seemed to find the notes she was looking for and frowned.

The doctor was frowning slightly, as if in an effort of memory.

The doctor frowned deeply in thought, but she didn't look angry.