He was walking along the sands ______ he saw a big footprint in the sand.A．while_刷题宝

题干

He was walking along the sands ______ he saw a big footprint in the sand.

A．while

B．as

C．when

D．after

上一题下一题 0.64难度单项选择更新时间:2013-01-04 08:25:53

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