________ the convenience of digital payment, many senior citizens started to use smart phones.

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1. (2019高一下·吉林期末) ________ the convenience of digital payment, many senior citizens started to use smart phones.

A . To enjoy B . Enjoying C . To have enjoyed D . Enjoy

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吉林省五地六市联盟2018-2019学年高一下学期英语期末考试试卷（含听力音频）