Miss Richards was a teacher at a school for boys and girls. She【C1】______chemistry and physics from the lowest to the highest cl

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问题     Miss Richards was a teacher at a school for boys and girls. She【C1】______chemistry and physics from the lowest to the highest classes in the【C2】______Sometimes the new classes【C3】______rapidly, but sometimes they were very【C4】______, and then Miss Richards had to【C5】______things many times.
    One year, the first class had been studying chemistry for several【C6】______when Miss Richards suddenly asked, "What is water? Who knows?【C7】______up?"
    There was silence(沉默)for a few seconds, and Miss Richards felt sad(难过), but then one boy【C8】______his hand.
    "Yes, Dick?" said Miss Richards encouragingly(鼓励地). He was not one of the brightest children in the class, so she was【C9】______that he could answer.
    "Water is a liquid which has no【C10】______until you wash your hands in it, Miss. Then it turns black," the boy replied with great confidence(信心).
【C8】

选项 A、lows
B、ride
C、raised
D、put

答案C

解析 raise one’s hand=put up one’s hand。
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