单选题 I spent all the winter break with my friends. Not a single day ______ a few hours to myself.
【正确答案】 B
【答案解析】[解析] 本题的考点为not a single day放在句首时句子要用部分倒装,即把助动词提前,动词had是实意动词have的过去时,其助动词要用did,因此本题选择B。