At first he refused to admit he had stolen but when he was shown the videotape, he and ad

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A. broke up
B. broke away
(答案→)C. broke down
D. broke in
解析：考查动词短语的辨析。句意：一开始他拒绝承认偷了，但是当给他看录像的时候，他崩溃了，承认了一切。break down 意为“(健康，精神)跨下来”；break up 意为“分散；拆散”； break away 意为“脱离、摆脱”；break in 意为“中断、破门而入”。选C。