he in the factory since he left schoolten years ago 英语单选he————in the factory since he left schoolten years agoA works B worked C was working D has worked

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he in the factory since he left schoolten years ago 英语单选
he————in the factory since he left schoolten years ago
A works B worked C was working D has worked

D 就记住:since引导的时间状语从句,主句现在完成时,从句一般过去时

D 从过去一直到现在 用现在完成时 since为标志