I can see a blackboard . A. 教室 B. 黑板 C. 操场
I want to find a good book. I'm going to the _______.
_____ are you going to Beijing?
--- She cleans streets. Who's she? --- Oh, she is a _______.
My uncle is _____ accountant. He works in _____ air-conditioner company.
Which picture means "One way"?