应该勇敢
Dear Mr.Smith, I'm sincerely sorry to tell you that I could'nt have the business talk we've made together. I am eager to come but my manager has asked me to go to Beijing on business these days until Monday.
黑粉精灵
Dear Liqiang I'm glad to your invitate me to your party this weekend I like it,.But I'm really sorry that I cannot go.Because my mother will go to Shanghai through here this weekend,she hope I can go shopping with her and we miss each other.. yours Wanghong
