__________ he is old, the old man still insists on studying at a night school.

   A. If            B. Although               C. When           D. Because

__________ he is old, the old man still insists on studying at a night school.

1. A.
   If
2. B.
   Although
3. C.
   When
4. D.
   Because

__________ he is old, the old man still insists on studying at a night school.

   A. If               B. Although           C. When        D. Because

__________ he is old, the old man still insists on studying at a night school.

 __________ he is old, the old man still insists on studying at a night school.

   A. If        B. Although     C. When     D. Because