Without gravity, we _____ walk on the ground as freely as we do now. A．couldn’t_刷题宝

题干

Without gravity, we _____ walk on the ground as freely as we do now.

A．couldn’t

B．mustn’t

C．shan’t

D．needn’t

上一题下一题 0.64难度单项选择更新时间:2013-05-22 08:03:21

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