This kind of gel pen which ______ smoothly is quite popular with students.A．is w_刷题宝

题干

This kind of gel pen which ______ smoothly is quite popular with students.

A．is written

B．is writing

C．wrote

D．writes

上一题下一题 0.4难度单项选择更新时间:2017-08-16 05:15:09

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