Because of the bad weather, the travelers had to stop, and decided to a tent for the night

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A. put away
B. put off
C. put down
D. put up
解析：put away放好，抛弃；put off推迟，阻止； put down记下，贬低；put up提供，建造。句意：由于天气不好，旅行者们不得不停止了，决定搭一个帐篷过夜。结合语境可知下文表示建造的意思，故选D。