16．At the railway station，the mother waved goodbye to her daughter until the train was ______．（　�。�
A．out of sightB．out of reachC．out of orderD．out of place

分析 在火車站，母親揮手告別她的女兒直到火車看不見了．

解答 答案：A，考查介詞短語的辨析，A是看不見的意思，B是夠不著的意思，C是出故障的意思，D是不合適，不恰當?shù)囊馑�，根�?jù)語境是"直到火車看不見了"，故答案為A．

點評 考查介詞短語的辨析，在平時的學習中要對這些短語進行積累，再根據(jù)具體的語境確定答案．

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