A:what is your best friend?B:my best friend is my classmate……,We often go home together and play basketball.C:my best friend is my classmate,too.She is my deskmate.D:my best friend is ……,I knew he when playing football.But I just told him of trouble,can you help me?A、B、C：of course! A:what is your best friend?B:my best friend is my classmate……,We often go home together and play basketball.C:my best friend is my classmate,too.She is my deskmate.D:my best friend is ……,I knew he when playing football.But I just told him of trouble,can you help me?A、B、C：of course!