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 !
