根据下面的对话情景, 在空白处填上一个适当的句子, 使对话意思完整、通顺。

A: Amy, did you go to Andy's party at Sunday?

B: Yes. I did. BuIdin'1se you. ?

A: I planned to go, but I had to go to the hospital.

B:  ?

A: My brother fell down and hurt his arm.

B: I'm sorry to hear that. Is he OK now?

A: Yes. Did you enjoy yourselves at the party?

B: . We had great fun. Lily played the piano at the party, and Jack danced to the music.

A: Sounds interesting.  .

B: Michael performed Chinese kung fu.

A: Chinese kung fu? ?

B: Nobody. He learned all by himself.