摘要: many times, but he still didn’t understand it. A. Having been told B. Though he was told C. To have been told D. He was told [解析]答案选D.句中的并列连词 but 表明整个句子为并列句.同时表明but前应是一个独立的句子.而不能是一个非谓语动词短语.又因为though为从属连词.用以引导让步状语从句.它与连接并列句的并列连词 but 不“兼容 .所以也不能选B .

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