Unit3 Topic 1课题Unit3 Topic 1 Section B课型探究课课时_3、It must be great fun.那肯定有趣语法:must beV 表肯定猜测 cant beV 表否定推测may beV 可能,也许( )1.-Listen, who is singing?-It_ Mary. Because she is going to join the Super Girl clubA. must be B. may be C. cant be( )2一Where is Mary,Tom? 一Her mother is ill . She _in the hospital Amaybe Bmay