Neither of them knew what __________ was doing.
She was scared _______ when hearing the sound of explosion.
—Are you going to take part in the speech contest? — ___________. It’s too good an opportunity to miss.
When I was young, I was always ____ to my elder brother wherever he went.
He accidentally _______ that he had quarreled with his wife and that he hadn’t been home for a couple of weeks.
—How about camping this weekend, just for a change? —OK, ______ you want.