and, yet, or; a, an, thePut on your down jacket, ______you will

and, yet, or; a, an, the
Put on your down jacket, ______you will catch ______cold.
【正确答案】:or/a
【题目解析】:此为“祈使句+ or +简单句”结构,是一种常用句型。其中or意为“否则”,祈使句相当于一个条件,可以和以“if”引导的条件状语从句进行转换。