–--What is the best way to relax?–--I think the best way to relax is ______ exercise.
—________ playing a game?— That’s a good idea.
— Mary, can you take good care of ________ while I’m not at home?— Of course, I can.
The girl ________ black hair is my sister.
What’s the matter ________ the kitchen fan.
Can I speak _____ Mr Wang?