问题
Did you have a hard time traveling back home?—–Yes, it ______ for four days when I arrived in Guiyang and all the roads______ covered with ice
A:snowed, were
B:was snowing, had been
C:had been snowing, had been
D:had snowed, were
B:was snowing, had been
C:had been snowing, had been
D:had snowed, were
正确答案是：
