By the middle of the 21st century, the vast majority of the world’s population _____ in cities rather than in the country.
Don’t try to cheat in the examination. You will never __________ it.
After the long journey, the three of them went back home,_________.
Hean important part in putting out the fire.
The old man put on his glassessee better.
—I think you should phone Jenny and say sorry to her. —. It was her fault.