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—Did you notice John was not at work today?
—No.If _______ working,I would have noticed it.
A.I’dB.I was
C.I’d beenD.I were?
C?
从“Did you notice” 可知下面的回答是针对过去情况的假设,用过去完成时,即I’d been相当于I had been。
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