in the study lost in thought for a long time, I suddenly realized that nothing in the world remains .
My room is very comfortable ______ the fact that it is very small.
You should ______ him to be innocent until he is proved guilty.
After the long journey, the three of them went back home, ______ .
Though he started late, Mr. Guo played the piano as well as, if ______ ,you do.
After recovering from his illness, he was advised to ______ gardening as a hobby.