Dr Frank failed many times but he finally ________ to find a

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
hcc46801 1年前 已收到1个回答 举报

带着心情走远方 幼苗

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B

1年前

6
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