______ difficult the problem was, he tried his best to solve it.A．No matter B．Al_刷题宝

题干

______ difficult the problem was, he tried his best to solve it.

A．No matter

B．Although

C．Whatever

D．However

上一题下一题 0.4难度单项选择更新时间:2012-06-08 10:00:06

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