选用适当的be动词填空。1.Who___are______the
students
over there？They__are_______Tom and his friends.2.____are______you busy now？No.I_am______not.3.What___is______tow and eight？It____is___ten.4.Where______are_____Helen and Beibei？They__are___in
the playground.5.I____am_____a student.My sister___...
