I tried to look intelligent but had no idea what they were talking about.

He had a rather well shaped head and looked intelligent "I see," the young man said.

Twenty years in the making, it looked intelligent and ready for serious action.

I closed my mouth and tried to look reasonably intelligent.

He was well spoken, looked intelligent, and had a quiet manner about him.

The eyes looked smaller and more intelligent, but he didn't say anything directly.

Though cut from the same mold, Jake looked a little more intelligent.

Bill tried to look intelligent, even though he was feeling very dim.

He came, finally, to a man who looked more intelligent than frightened.

"He looked intelligent; I therefore assume he's in love with you."