Use the correct tense forms of the verbs in brackets!

1. While the children football, the rain began to fall.
2. When we dinner, Susan took the dishes away.
3. We shall have supper when he .
4. Tell me if you able to return by next Monday.
5. If you wash the dishes, you a chocolate.
6. I to London tomorrow.
7. The station-master knew what each passenger to do.