I usually go to bed early, but I ________ up late to watch a football game last night.
A. stay B. stays C. staying D. stayed
【答案】D
【解析】句意：我通常上床很早，但是昨天晚上我熬夜很晚看足球比赛。A. stay一般现在时态结构；B. stays主语单三时一般现在时态结构；C. staying现在分词；D. stayed过去式，根据last night可知用过去时态，谓语动词用过去式；故选D