答案：

　　1-5.DDBDB　　　 6-10.DBBCB

　　11-15.BCADC　　16-20.CADDA

　　21-25.DDBCA　　26-30.CBCDA

　　31-35.BBCAD　　36-40.ABACC

　　41-45.ADADA　　46-50.CCBBC

　　51-55.ABCAA

　　[高分范文]

　　Dear Mr.Stevenson,

　　We are very glad to hear that you-the Britain Children Chior will visit our school.Welcome!I,representing our school,will receive you.I am pleased to tell you the trip plan.

　　I will pick you up at the airport on July 23rd,and then take you to live in the Xin Hua Hotel,where you can have a good rest.On the morning of 24th,we will visit our school and have a great dinner.Our headmaster will make a speech.At 7:00 p.m. we will watch a performance.The next day,we will visit the Tian’anmen Square,the Palace Museum and the National Museum.On 26th ,I will see you off.

　　I hope you can have a good time.Best wishes to you.