问题
选择题
—Was the trip pleasant when you vacationed in the mountain village last summer?
—No，it__________for four days when we arrived，so the roads were very muddy.
A．was raining
B．would be raining
C．had been raining
D．have rained
答案
C
根据题意及“for four days”,应采用过去完成进行时。