At the end of the term, our ethics (伦理学) professor gave us a test. He had told us {#blank#}1{#/blank#} (expect) one and had warned us it would be included in the final grade.

    The test began. Sure enough, I was {#blank#}2{#/blank#} confident that I finished all the questions after forty {#blank#}3{#/blank#} (minute) except the very last one: What is the name of the woman who cleans the lecture hall?

    I thought it was {#blank#}4{#/blank#} joke. I'd seen the woman many times. She'd been working in the building for at least a year. She is short {#blank#}5{#/blank#} dark hair, in her fifties, and we'd even smiled at each other once or twice. But I didn't know {#blank#}6{#/blank#} (she) name because I'd never thought to ask her. I handed in my test and the last question {#blank#}7{#/blank#} (leave) unanswered-hoping the final result wouldn't be influenced to {#blank#}8{#/blank#} (bad) because of it. But then one student put up his hand. He hadn't {#blank#}9{#/blank#} (finish) the test, either. "I 'm just wondering," he said. "Will it really change my grade if I don't complete that last question?"

    "Certainly," our professor {#blank#}10{#/blank#} (smile). "In your future job..."

    I've never forgotten that lesson. I also learned that the cleaner's name was Sherry.