在锅炉正常运行期间，应进行哪些定期工作？（以自然循环汽包锅炉为例）

情景对话（5分）
A: Hi, Li Lei, what are you going to do this Friday evening?
B:   小题1:   
A: What’s the name of the movie?
B: Real Steel.   小题2:   The scenes are beautiful and the music is pleasant.
A: Really?  小题3: 
B: At 7:00 p.m.   小题4:  
A: I’d love to, but my grandma is ill, I have to    stay at home to look after her.
B： 小题5:     I hope your grandma will get well soon.
A: Thank you, Miss Liu.

A. What time is it going to start? B. Why not go with me? C. What a pity! D. I’m going to see a movie. E. I hear it’s very exciting.