At the railway station the mother waved goodbye to her daughter until the train was . A.

问题补充：

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

答案：

(答案→)A. out of sight

B. out of reach

C. out of order

D. out of place

解析：

这题考查词组辨析：out of sight看不见out of reach够不着out of order秩序混乱out of place在不恰当的位置。根据句意：在火车站，妈妈向女儿挥手告别，直到火车消失不见。选A。