题目

—Have you ever been t to Shanghai? —Yes. I _______ there for three days with my parents last month. A． have gone B． have been C． went D． was 答案：D【详解】 句意： ——你去过上海吗？ —— 对。上个月我和父母在那里呆了三天。 考查一般过去时。根据 “ last month.”可知时态是一般过去时，排除 AB 选项。再根据 “for three days” 可知不用短暂性动词 went ，应用 was 。故选 D 。要使函数的图象不经过第一象限，则实数m的取值范围是________．