A. The windows must be closed before you go to bed.
B. The windows are closing before going to bed.
C. The windows are closed before you go to bed.
D. The windows were being closed before bed.
A. The windows must be closed before you go to bed.
B. The windows are closing before going to bed.
C. The windows are closed before you go to bed.
D. The windows were being closed before bed.