It has been years ________ I returned home.
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参考答案:
C
译文：我回家已经有好几年了。此题考查连词 since 的用法。 since 表示“从 (过去某事 )以来，以后或到现在”时，主句多用完成时态。又如：Where have you been since I last saw you? 自从我上次见到你以后，你到哪去了 ?
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