Toffner acted very unconcerned but inwardly he was in a turmoil.

Kraft got the car moving, made a special effort to act casual and unconcerned.

She tried to act casual and unconcerned, but now she was fully alert.

Your best bet is to act unconcerned.

She smiled brightly, act unconcerned and natural in her manner.

She smiled brightly, acting quite unconcerned and natural in her manner.

"You're acting pretty damned unconcerned about all this."

Stannall stared at me with such a menacing intensity it was very difficult to act unconcerned.

I tried to act unconcerned, but I knew how dangerous things could be in such a dark part of the county.

Trying to act unconcerned, he folded the paper and tucked it into the pocket of his nightshirt.