He __________ that until he __________ the directions once again.
A.didn't understand ; had read |
B.hadn't understood ; read |
C.understood ;had read |
D.understood ; read |
推荐套卷
He __________ that until he __________ the directions once again.
A.didn't understand ; had read |
B.hadn't understood ; read |
C.understood ;had read |
D.understood ; read |