Having checked the doors were closed, and ___ all the lights were off, the boy opened the door to his bedroom.
Some people's greatest pleasure is ______ .
. It's very kind ______ you ______ say so.
The old man's ______ pity on the snake led to his own death.
It is no good ______ today's work for tomorrow.
It's no use______ with him. You might as well ______ with a stone wall.