Sally (do) her homework every day. But she it last night.
【题目】Sally ____ (do) her homework every day. But she ____ (not do) it last night.
【答案】does didn’t do
【解析】
句意：莎莉每天做家庭作业。但她昨晚没做。由every day可知，上句是一般现在时，Sally 是第三人称单数，谓语动词do用其三单形式does；由last night可知下句是一般过去时，谓语动词的否定形式要借didn't，后接动词原形。故答案为does；didn’t do。
