一、教学目标与要求
通过本单元教学，学生应能熟练地运用“要电话”的常用语；复习第13～17单元的语法项目；了解办公设备现代化和有关防火安全的知识。
二、教学重点与难点
1．重点词汇
rush sb．off his feet, change, action, repair, work on, fix up
2．重要句型
1) It is better to ask for help at the beginning rather than to wait until a busy period when everyone is rushed off their feet．
2) What is more, this “information line” operates 24 hours a day．
3) It did not take the firefighters long to put out the fire, and they at once started to look for causes of the fire．
4) They had to work inside the ship, cutting away old metal, fixing new metal plates, drilling holes, laying electrical and phone wires and fixing new pipes for water and steam．
3．语法 复习-ing形式，to do和表达等
4．日常交际用语
1) May I speak to…? 2) Hello．Who's that speaking? 3) I called to tell you…4) Hold on, please 5) Wait a moment．6) Can I take (leave) a message?
三、 难点讲解
The man who had fixed up the air line was also questioned.
1．fix up
A．修理，安装；改变式样(使……仪容端正)。例如：
1) They are busy fixing up the lights．他们在忙着安装灯光设备。
2) Wait until I get fixed up．稍等一下，我把仪容打扮整齐。
Let's fix up a date (a time and place ) for the meeting．我们来决定聚会的日期(时间和场所)吧。
C．为(某人)安排。例如：
I will fix you up for the night。我来为你安排今晚的住宿。
D．解决(
