---DidyounoticeJohnwasnotathometoday?---No.If________working,Iwouldha

发布时间：2020-08-07 01:32:29

---Did you notice John was not at home today?---No. If ________ working, I would have noticed it.A.I'd not beenB.I wasn'tC.I'd beD.I weren't

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A解析本题考查虚拟语气用法．分析语境含义可知，该句表示对过去情况进行假设，从句应用had done的形式．
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