—Where did you see him for the first time?— It was in the factory we worked.A. thatB. whe

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A. that
(答案→)B. where
C. which
D. when
解析：这题考查定语从句，根据上下文，--你在哪第一次见到他的？--就在我们工作的工厂。说明这是定语从句不是强调句，因为定语从句中不缺主宾表，所以用where。选B。