单选题
The brave firemen had fought for days before they managed to ______ the forest fire.
A. put on B. put up C. put off D. put out
【正确答案】
D
【答案解析】本题测试动词短语的辨析。put on穿上；假装，欺骗。put up举起，提供，提名。 put off推迟，拖延。put out扑灭，熄灭；出版；生产。根据句子意思，消防队员应该是扑灭森林火灾，所以D为正确答案。