题目内容：

短文改错

Dear Mum，

Sorry to have kept you waiting last night. Excuse me for my come back late. I was held up because the power failure in the school. The lights sudden went off in the middle of the play. The students were confused about how to do. I was in the charge of the staging of the play, but I could not leave the stage in disorder. I had to try my best to control the situation. I arrange to light the candles preparing for the play in advance. After the performance, I called a few taxi to take the actors home since many of them lived far away. I hope you do not mind my lately return.

Love，

Li Hua