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.