Question

－Was the driving pleasant when you vacationed in Mexico last summer?

－No, it _______for four days when we arrived, so the roads were very muddy.

[　　]

A． was raining　　　 B． rained

C． had been raining　　D． have rained

Answer 1

答案：C
解析：

had been raining 是过去完成进行时,　表示我们到达之前某时开始一直持续到我们到达之时所发生的情形, 一直在下雨, 因而造成道路泥泞。