In the 1930s, the two countries were at ______ war, and his father was fighting at _____ front.

   A. the; 不填　　　B. 不填; the       C. the; the        D. 不填;不填

In the 1930s, the two countries were at ______ war, and his father was fighting at _____ front.

In the 1930s, the two countries were at ______ war, and his father was fighting at _____ front.

In the 1930s, the two countries were at ______ war, and his father was fighting at _____ front.

1. A.
   the; 不填　　
2. B.
   不填; the
3. C.
   the; the
4. D.
   不填;不填