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

A. To enjoy

科学司元51d7心技8de0方量优8f64748b0d24慧8617升量-ad8f0db2网习a859途学ba3c东bca2公04bb心学广量径限上2bcb0d9d有7228软秀件 B. Enjoying

C. To have enjoyed

D. Enjoy

【答案】A

途学ba3ccd6e元51d7心8e54c186有7228技8de0方量优8f64748b0d24限上2bcb0d9d升量心学软秀上件广量径a47a4db9科学慧8617网习a859东bca2公04bb心d2f5法9b7e98bf-ad8f0db2学司

【解析】

【详解】考查非谓语动词。

慧8617网习a859优8f64748b0d24有722813c2-ad8f0db2学升量心东bca2智根学4a5f科学途学ba3ccd6e公04bb心d2f5法9b7e98bf广量径a47a4db9径件e1a0技8de0方量司软秀上8f21元51d7心8e54c186费限上2bcb0d9d 此处是不定式作目的状语。

句意：为了享受数字支付的方便，很多老年市民开始使用智能手机。故选A。