第36题: [单项选择]We looked for a table to sit down, but they were all ______. A. reserved for B. engaged in C. used up D. taken up 参考答案:D 答案解析:句意:我们要找个桌子坐下,可是所有餐桌都已有人。take up意为“占去(时间、地方、注意力等)”; reserve for意为“为…留出,保留”;engage in意为“从事;参加”;use up意为“用完,用光;耗尽”。