The teacher said I have got a low mark because, ________, I did not do your homework．A.for one thingB.in a wordC.on the other handD.as a result
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A解析句意：老师说我的分数很低，其原因之一是因为我没有做作业。for one thing 首先；in a word总之；on the other hand从另外一方面说；as a result“结果是……”。