( ) last week ,my father had worked in the factory for ten yearsA_英语解答

( ) last week ,my father had worked in the factory for ten years
A.Since the end of B.By the end of C.At the end of D.In the end of

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解答

选B
后面用过去完成时（had worked）,所以前面的时间用by the end of
by the end of (到……时)+“过去时间”,用于过去完成时.