( )陌生人向你问好,你应该说_______ A. Hi, I’m Sarah. B. Mike
__________________ they playing sports? A. are B. is C. am
He’s __________________ an e-mail. A. writing B. write C. written
This is __________________duck. A. my B. an C. you
I have a __________________. A. pen B. pencil-boxes C. pencils
The elephants often water with trunks. A. drinking it’s. B. drinking their. C. drink their