He looks very sad because someone his home and took away his computer last night. A. brok

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A. broke out
B. broke up
C. broke off
(答案→)D. broke into
解析：break out爆发，突发；break up 打碎，结束；break off这段，暂停；break into闯入，破门而入。句意：他看起来非常伤心，因为昨晚有人闯进了他的家里面，并且拿走了他的电脑。结合语境可知选D。