he in the factory since he left schoolten years ago 英语单选

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
英语人气:563 ℃时间:2019-10-25 17:08:34
优质解答
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
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