Nothing he did was helpful to solve this problem, _______?A．didn’t heB．was itC．w_刷题宝

题干

Nothing he did was helpful to solve this problem, _______?

A．didn’t he

B．was it

C．wasn’t it

D．did he

上一题下一题 0.4难度单项选择更新时间:2011-07-18 01:43:42

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