【题目】At the railway station, the mother waved goodbye to her daughter until the train was
_______.
A. out of sight B. out of reach
C. out of order D. out of place
在线课程【答案】A
【解析】
试题分析：out of sight看不见；out of reach够不到；out of order杂乱, 出故障；out of place不在原来的地方, 不恰当。句意为：在火车站, 这位母亲挥手向她的女儿告别, 直到火车看不见为止。