( ) 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.
I’m very proud_____my father.
A. forB. withC. of
Sally is going to go to the library ____ Sunday.
A. inB. atC.on
It’s going to_______ in Shanghai.
A. rainy B. be rainC. rain
Look! The boy ________after a dog .
A. running B. runs C.is running
The birds are sitting ________the trees.
A. in B. to C. on