Edison asked his father why the hens could hatch eggs ___he couldn’t. A．asB．andC_刷题宝

题干

Edison asked his father why the hens could hatch eggs ___he couldn’t.

A．as

B．and

C．when

D．while

上一题下一题 0.85难度单项选择更新时间:2010-09-19 10:47:51

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