If someone has to an action or policy, they are responsible for it, and may be required to explain it to other people or be punished if it fails.
For many cities in the world, there is no room to spread out further, _____ New York is an example.
Pointing to the house on ____roof grew lots of bush, the old man told me that was ____ I would stay.
A lot of children are used to ______ their time ______ up by their parents and they simply don’t know ______ with their spare time themselves.
------ Go for a picnic this weekend, OK? --------______________. I love getting close to nature.
I’m sure you will do better in the test because you ________ so hard this year.