( ) 当你想向妈妈介绍Mike是自己的朋友时,你可以说: A、He’s Mike. B、She’s my friend. C、He’s my friend, Mike.
“Keep quiet” means __________.
The park keeper__________ Mr Smith__________ this afternoon.
My mother took out a__________ note and gave __________to me.
“No littering” means __________.
The different public signs__________.