It suddenly ______ to the detective that the professor was probably murdered by his own wife .A.came aboutB.took placeC.happenedD.occurred
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D解析试题分析：考查词组：这几个词都有发生的意思，但只有D. occurred可以用于It occurred to sb that…某人突然想起…，句意：侦探突然想起教授有可能被他自己的妻子谋杀了。选D。考点：考查短语辨析
点评：含义相同的词组，用法却大相径庭，要注意辨别，特别是一些动词的特殊用法要熟记，结合上下文做题。