＜正＞One of my favorite teachers at Southeast Missouri State University in Cape Girardeau was known for his droll（滑稽的）sense of humor.Explaining his ground rules to one freshman class,he said,"Now I know my lectures can often be dry and boring,so I don’t mind if you look at your watches during class.I do,however,ob ject to your pounding them on the desk to make sure they’re still running."
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