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
网友回答
(答案→)A. out of sight
B. out of reach
C. out of order
D. out of place
解析：介词短语辨析。A视野之外；B够不着；C杂乱；D不得其所的，不适当的；结合句意可知A正确。句意：在火车站，那位妈妈向女儿挥手告别直到火车消失在视野中。