问题
选择题
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
答案
答案：B
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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
答案：B