Dr Frank failed many times but he finally ________ to find a successful way to solve the problem. [

题目简介

Dr Frank failed many times but he finally ________ to find a successful way to solve the problem. [

题目详情

Dr Frank failed many times but he finally ________ to find a successful way to solve the problem.
[     ]
A. broke off  
B. broke through
C. broke down  
D. broke up
题型:单选题难度:中档来源:湖北省同步题

答案

B

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