[单项选择]—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
参考答案:C 答案解析:[解题指要] 该题测试动词时态的用法。C选项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事情，即一直在下雨，因而造成道路泥泞。动词的过去完成
