( )(2) 他在北京医院工作,怎么说:A.He studies in Beijing Hospital. B. He works in Beijing Hospital .
The train arrives ____ Beijing . A in B. at C. to
_____people are buying tickets. A.Many B. Much C. How many
There______ three boys in the classroom. A. is B.are C. have
_______ everyone happy? A. Am B.Is C. Are
Who _____ tired? A.am B. is C. are