--- My math teacher said I was too lazy.
--- . You should work harder.
A. Good idea
B. I’m sorry
C. Good luck
D. Have a great time
网友回答
A. Good idea
(答案→)B. I’m sorry
C. Good luck
D. Have a great time
解析：Good idea好主意；I’m sorry我很抱歉；Good luck祝你好运；Have a great time祝你玩得愉快。句意：我的数学老师说我太懒。根据下文，你应该更努力一点。结合语境可知选B。