Kate is said ________ abroad, but I don’t know what country he studied inA.to have studiedB.to studyC.to be studyingD.to have been studying
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A解析试题分析：考查非谓语动词的区别。A to have studied是不定式的完成式表示该动作发生在主句谓语动词is said之前就已经发生已经完成；B项不定式的一般式表示这一动作发生在主句谓语动词之后；C项不定式的进行式表示发生这一动作在主句谓语动词发生时正在进行；D项不定式的完成进行式，表示这一动作过去发生持续到现在并且还有可能继续下；由“he studied in ”可知kate出国留学意思发生在is said之前，故A正确。考点：考查非谓语动词的区别。