The little boy raised a hand in front of his face.

She raised a hand to him without looking up from the paper.

He turned to face the room and raised a hand.

Then he put down his cup and raised a hand.

He took a step toward her and raised a hand.

She took a step forward and he raised his hand again.

He held the door for me, but I raised my hand.

He took a half step back, as though I had raised my hand to him.

He made a move toward the door, but she raised her hand.

Instead he raised his hand in order to get the floor.