My friend Jack was the first person I knew ______an iPhone 5S.A．usingB．to useC．u_刷题宝

题干

My friend Jack was the first person I knew ______an iPhone 5S.

A．using

B．to use

C．used

D．having used

上一题下一题 0.64难度单项选择更新时间:2014-03-07 05:53:53

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