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___________theconvenienceofdigitalpayment,manyseniorcit...

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问题详情:

___________theconvenienceofdigitalpayment,manyseniorcit...

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

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

【回答】

A

知识点:非谓语动词

题型:选择题

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