He said he would come . He didn't .A. besidesB. butC. thoughD. either

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A. besides
B. but
(答案→)C. though
D. either
解析：   题意：他说他会来，然而他没来。besides 介词，“除……之外”；but 转折连词，“但是”；though在此为副词，“然而”；either 副词，“也”。