是terrible cold还是serious cold?

是terrible cold还是serious cold? terrible cold可数吗 是catch a cold还是catch cold 是quite cold还是so cold? it is --------(terrible)cold outside 是on a cold morning 还是in a cold morning? 是in a cold winter 还是on a cold winter? 寒冷的冬天是the cold winter还是cold winter? 天气变冷是get cold还是turn cold? 是in cold winter nights还是on cold winter nights cold I have a cold serious是什么意思