第14题: [单项选择]—Was the driving pleasant when you vacationed in Mexico (墨西哥) last summer —No, it ( ) for four days when we arrived so that the roads were very muddy. A. was raining B. had been raining C. would be raining D. have rained 参考答案:B 答案解析:
从句用过去时态,主句应该与之一致,因有"for four days",所以应该用完成时态表示过去持续的动作。