—Have you thought of a topic for your speech yet?—No, I______a lot about it, but I haven’t decided.
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.
27. I wonder whether the police ______ that lost child or not