-----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.

-----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

-----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.

1. A.
   snowed, were
2. B.
   was snowing, had been
3. C.
   had been snowing, had been
4. D.
   had snowed, were

-----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

-----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