Dr. Smith failed many times but he finally ______ to find a successful way to solve the problem.

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问题 Dr. Smith failed many times but he finally ______ to find a successful way to solve the problem.

选项 A、broke off
B、broke down
C、broke out
D、broke through

答案D

解析 词组辨析题。break off意为“停止说话,中断”;break down意为“出毛病,抛锚”; break out意为战争,火灾的突然“爆发,发生”;break through意为“突破,征服”。本句大意为:史密斯博士失败了多次,但他最终找到了一条解决问题的成功之路。
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