_______ in doing his homework , he didn’t know I had walked in.A．BuryingB．Buried_刷题宝

题干

_______ in doing his homework , he didn’t know I had walked in.

A．Burying	B．Buried
C．To Bury	D．To be buried

上一题下一题 0.64难度单项选择更新时间:2016-11-18 12:57:27

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