i had an accident yesterday.()what happened?()

i had an accident yesterday.()what happened?()
bad luck!()
no,but my finger hurt!
how do you feel now?
much better.()
you must be careful when you use a knife next time.
i will.()
how careless!
A.my brother gave first aid.
B.how did it happen?
C.was it serious?
D.my mother warned me,but i didn't listen to her.
E.i'm sorry to hear that.
F.i hurt my finger when i was cutting an apple.
G.do you know how to give first aid?