I took a cup of coffee with me to my next class. It helped. My pauses, as I __14__ the coffee, not only gave my students __15__ to think about what I had said, but gave me time to think about what I was going to say next. I began to use my __16__ to look around the room to see how my students were reacting to what I had just said. When I saw their __17__ wander, I tried to bring them back. When I saw them puzzled over some concept that I thought I had __18__， I gave another example. My __19__ became less organized and less brilliant, but my students seemed to __20__ me better.

语篇解读：本文是一篇记叙文。作者踏上大学的讲台前向老教授学习教学方法，其中一位数学教授的教具是一杯咖啡，这给作者留下了深刻的印象，在以后的教学生涯中，一杯咖啡回味无穷。

　　1．A.wasted　　　　　　　　 B．cost

　　 C．killed D．spent

　　解析：选D　我已经花费了很长时间学习教什么。cost的主语是物，故排除，kill one's time"消磨时间"。

　　2．A.manage B．copy

　　 C．teach D．consider

　　解析：选C　根据"earning what to teach，"可知此处是说没有学怎样教(teach)。

　　3．A.put up B．build up

　　 C．take up D．make up

　　解析：选D　make up for"补偿"。根据前文所述可知，此处是说学校想利用一个周末来弥补(从有经验的教授身上学习怎么教)。

　　4．A.experiences B．plans

　　 C．presentations D．designs

　　解析：选C　同事们介绍了他们精心准备的教具，我很欣赏他们的介绍，但一样教具也没记住。前一句中的presented有暗示。

　　5．A.alone B．absent

　　 C．lonely D．awkward

　　解析：选A　分析语境可知，在休息期间我发现自己孤单一人，然后就和一位数学教授聊起天儿来。alone强调一个人而未必孤独；lonely强调孤独、寂寞。

　　6．A.method B．material

　　 C．tool D．skill

　　解析：选C　根据第一段中"My colleagues presented well­crafted lectures about the tools they used."以及下文中回答的a cup of coffee可知答案为C。

　　7．A.following B．grasping

C．seizing D．imitating