Eric was not entirely successful at hiding his pleased expression.

The girl couldn't hide her expression when we ordered chicken feet.

He didn't hide his expression as clearly as he'd hoped.

She looked back, but the night hid his expression.

To hide his telling expression, he moved to the window.

I took a sip of tea to hide my expression.

One of the other soldiers, partly to hide his own expression, patted him vigorously on the back.

He looked around, not bothering to hide his expression of delight.

She took refuge in her coffee again, hiding her expression.

Rosh hid his expression again, for it would be one of defeat.