口语应用。根据对话的内容，用适当的句子补全对话。（满分10分）
A: Have you seen Jim these days?
B: No, he’s gone to Japan to see his grandfather.
A: 20. ____________________________
B: Yes, he lived there before he came here.
A: 21. ____________________________
B: About one month.
A: 22. ____________________________
B: Yes, I’ve just received a letter from him.
A: 23. ____________________________
B: He said he had a very good time there and he also wanted me to give his best wishes to you.
A:24. ____________________________
有您这样的老师，我是多么的幸运啊！（完成译句）
I am to have a teacher like you!
好好休息一下，你的眼睛会好很多．（完成译句）
Your eyes will be much better after you a good ．
Wang Bing was very glad to receive a letter from his old classmates．（改为同义句）
Wang Bing was very glad to his old classmates．
Dave was making a model plane in the classroom at that time．（对划线部分提问）
Dave making a model plane at that time？
Li Lin listens to English on the radio every day．（改为否定句）
Li Lin to English on the radio every day．