The carpet where he was warm and comfortable, so he slept soundly.A. was layingB. was lyi

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易混淆词辨析题。动词lay表示“搁置、放”时，现在分词为laying,过去分词为laid；而lie作“躺”讲时，现在分词为lying,过去分词为lain，如其过去分词为lied,则含义为“撒谎”。此处为“躺的地方”，故用was lying。