There the mother waved goodbye to her daughter until the train was .A. out of sightB. out

问题补充：

There 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D. out of date

答案：

(答案→)A. out of sight

B. out of reach

C. out of order

D. out of date

解析：短语辨析。A看不见；B够不着；C杂乱；D过时；句意：知道火车看不见了，那位母亲才和女儿挥手再见。根据句意说明A正确。