He tried to look interested, but the longer the tour went on, the more difficult that became.

The Captain now looked more interested than he had before.

I have no desire to pay any attention or even try to look interested.

Of course, he was paid to look interested, so she didn't read a whole lot into his expression.

Always look interested in what the other person is telling you.

He was watching and looked interested, so I invited him to play.

For the first time she looked interested in what I had to say.

The big man's face changed, and he began to look interested.

Well, it's hard to look interested when you felt like I did.

He looked interested, and she could not return that interest.