loading1．你已安全返回北京
2．感谢他们的热情接待
1）去机场迎接
2）Jenny陪伴游览名胜古迹
3．希望他们有时间来北京游览
Dear Mr and Mrs Johnson,
参考答案及解析
21—25 ADBBD 26—30 DCDAC
31．can’t / couldn’t have watched TV 36torn down
32．avoid meeting him 37whom或of whom several
33．did he make a promise 38或which / that leads to
34．is limited to 39(suddenly) occurred to me
．have been ．several of ．leading to．It
35．It was not until she arrived / got / returned home 40．ahead of time
41—45 BBCBB 46—50 CBBAB 51—55 CACBC 56—60 CDCDB
61—65 DCBAB 66—70 ACCCA 71—75 CDBAC 76—80 ABDCA
One possible version：
Dear Mr and Mrs Johnson,
I’m writing to tell you that I had a safe journey back to Beijing. Thanks to your
hospitality, I had a wonderful time in Australia. It was my first time to go abroad and I was naturally a bit nervous when I first arrived. When I saw you at the airport,
however, I knew from your warm smile of welcome that everything would be all right. With Jenny’s help, I visited so many places of interest in Australia, which leaves me quite a good memory. I hope some day you will come to visit Beijing and I can return your kindness.
Best wishes,