It was when we were returning home ________ I realized what a good feeling it was to have helped someone in trouble.
32. His composition won first prize, ______ made him too happy to sleep for nights.
31. We are waiting ______ for your absence.
30. With little knowledge about the area he succeeded ______ many researchers failed.
29. A very beautiful scene spreads in front of the mountain, at the foot of which ______.
28. What was unexpected was that the disrespectable fellow ______ the old man.