TheChinesepeople____gunpowderinthe9thcentury.A．discoveredB．discoverC．willdiscove_刷题宝

题干

The Chinese people____gunpowder in the 9^th century.

A．discovered

B．discover

C．will discover

上一题下一题 0.99难度选择题更新时间:2016-12-29 05:02:45

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