英语翻译

英语翻译
1.While He Yan was at the doctor's,I was going to the class.
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2.Although some people may not remember who murdered him,they remember what were doing when they heard about the event.
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3.Dr Martine Luther King's murder took place about thirty years ago,before many American were born.
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4.Not all events in history are as terriblr as this,of course.
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