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 |
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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 |