Pratt failed many times but he finally ____ to find a successful way to solve th

题干

Pratt failed many times but he finally ____ to find a successful way to solve the problem.

A．broke out

B．broke up

C．broke down

D．broke through

上一题下一题 0.85难度单项选择更新时间:2013-05-24 08:12:29

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