( ) Sam and Bobby _____ happy at Christmas. A. look B. looks C. looking
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