________ the days went on, the weather got worse.

A.With

B.Since

C.While

D.As

答案及解析： D

解析：

【巧解导析】句意为：“随着时间流逝，天气变得更糟．”句中went on和got worse具有动作发生的同时性．若用with，则应为with the days going on.