Hiking by oneself can be fun and good for health. It may also be good for ______ building.
The angry boss ________ from the chair and went directly to him.
——Why doesn't he buy you a drink?——I don't know why, but it isn't _______ he had no money.
We were told that it was our _______ to read the text together.
It ________ that there is no way out of difficulty.
He was afraid there was any wild animal around him, looking round from ________.