Mr. Green has been in China for about four months. His students have made big progress in their English study. Besides, he has also been the basketball coach for his class since he began to teach them. Under his guidance, the students have learnt to put on a few English plays. Mr. Green himself has also learned a lot in China. He can speak some Chinese now. He has made many Chinese friends. He has also learned to cook some Chinese food. However, he has never been to a Chinese music concert. So, Lily and Xiao Yang have decided to invite him to a concert this Saturday evening.


          Lily:   Hello, Mr. Green. Are you free this weekend?
Mr. Green:   Yes, why?
          Lily:   We'd like to invite you to a Chinese music concert.
Mr. Green:   Oh, great. That's very kind of you.
          Lily:   You have learned the Chinese words "erhu" and
                   "piba". Now you can enjoy them at the concert.
Mr. Green:   Oh, I can't wait. When is it?
Xiao Yong:   7:30 on Saturday evening. Let's meet in front of the
                    library at seven.
Mr. Green:   All right. Thank you ever so much.