Dear Mr. and Mrs. William,

    I've learned that you are interested in Beijing Opera, so I've come to

give you two ticket for  tomorrow evening's Beijing Opera at Mei

                  1. tickets 

Lanfang Theater. But it's real a pity that you happened to be

                                  2. really                   3. happen

out. So I have to leave the tickets with this note. The opera will be put on

by some famous actors or actresses.He is well worth watching. By

                                4. and             5. It

the way, I've read the two books you lent me,that are very interested.

                                                                 6. which        7. interesting

This week, I am busy review my lessons in order to pass the final exams.  

                             8. reviewing

So I'm afraid of that I can't go to the Opera together with you .

              9.  去掉

I hope you will have ∧good time.

                              10. a