The parents are ________ by law to send their children to school.
. He is ____ China Daily. In other words, he works ______ China Daily.
—You seem to have had that car for years. ---Yes, I should sell it ____ it still runs.
. Do you know the girl _____ just now?
Now, children, it’s time you _______.
In order to prevent the fire spreading, some of the houses nearby _____before the firemen arrived.