32.______in the study lost in thought for a long time, I suddenly realized that nothing in the world remains .
A. Having sit; unchanged B. To sit; unchanging
C. Sitting; unchanged D. Sitting; unchanging
32.______in the study lost in thought for a long time, I suddenly realized that nothing in the world remains .
A. Having sit; unchanged B. To sit; unchanging
C. Sitting; unchanged D. Sitting; unchanging
C