【单选题】Dr.Smith failed many times but he finally ______ to find a successful way to solve the problem.
A.broke off
B.broke down
C.broke out
D.broke through
【单选题】Dr.Smith failed many times but he finally ______ to find a successful way to solve the problem.
A.broke off
B.broke down
C.broke out
D.broke through
发布评论 查看全部评论