She needed a moment to read the expression on his face.

In fact, I couldn't read the expression on his face.

He looked at me, and I couldn't read the look on his face.

I could not read them or the expression on his face.

She tried without success to read the expression on his face.

No expression at all could be read on his face.

It was hard to read the look on her face.

She turned away again, aware that he'd read too much on her face.

I couldn't read the expression on his face, and wanted to.

He was too far away for her to read the expression on his face.