题目内容
At the railway station,he waved goodbye to his friend until the train was ________.
A.out of sight
B.out of reach
C.out of order
D.out of place
【答案】
A
【解析】
句意为:在火车站,他挥手同他的朋友告别直到火车看不见了。out of sight看不见,符合题意。
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