AlexanderBellwonthefameastheinven

发布时间：2020-07-27 01:13:19

Alexander Bell won the fame as the inventor of the telephone when he ________ as a teacher of deaf children．A.employedB.is employedC.was employedD.was employing

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C解析选C。根据句意，此句应是过去时的被动语态，故选C。
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