( ) (1) 当你问别人你多大了时, 你应该说:A. How are you ? B. How big are you ? C. How old are you ?
It's very difficult, _______ I can do it myself.
Are you going toplay Ping-Pong _______ football?
The boy is sitting_______her father and mother.
It's a quarter_______six. Let's go home.
What's the matter_______ you, Linda?