--I phoned your home at around 9 yesterday evening. Why didn't you answer it?--Impossiblle. Oh, now I remember: it was ________ I was taking a bath.A.whenB.whichC.whereD.what
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A解析句意：--昨晚九点左右我给你家打电话，你怎么不接电话啊？--不可能。哦，我想起来了，当时我在洗澡。本题考查表语从句的用法，根据上下文可知A为正确