Dr. Frank failed many times but he finally to find a successful way to solve the problem.
A. broke through
B. put up
C. picked out
D. gave away
网友回答
(答案→)A. broke through
B. put up
C. picked out
D. gave away
解析：句意，Frank博士失败了许多次，但是最终他取得了突破性进展，找到了解决这个问题的成功的方法。break through 取得突破性进展 put up 举起 pick out 挑选 give away 赠送，根据题意，故选A