小朋友，你能从选项中选择正确的选项把对话补充完整吗？

A．What did you do

B．fell over

C．What happened to you

D．Thank you very much

E.         Be more careful
W：_________________________________?
M: I hurt my knee .
W: __________________________________?
M: I played basketball , then I ________________, Then I bumped my knee .
W:____________________________ next time .
M: _____________________________
W: You’re welcome !