【题目】It ___________ last night, for the road was very muddy.
A.would have rainedB.must have rainedC.should have rainedD.must rain
在线课程【答案】B
【解析】
考查情态动词+have done。句意：昨晚肯定下雨了，因为路上泥泞不堪。根据“for the road was very muddy”可知，此处表示对过去事情的肯定推测，must have done表示“一定做过某事”，故B项正确。