—Is the letter from your mother?—Yes.But she ________the letter herself,because she doesn’t even know one word.
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.