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【题目】Betty ________ a math teacher since 2016. She likes the work very much.

A.has beenB.isC.will beD.was

【答案】A

【解析】

句意:贝蒂自2016年以来一直是一名数学老师。她非常喜欢这份工作。

考查动词时态辨析。is是,was是其过去式,will be是一般将来时结构,has been是现在完成时结构。根据“since 20162016年以来,是一段持续的时间,可知需用现在完成时,故选A

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