Choose the right answer.

1. I ... my homework, when the snowstorm began.
2. Dan ... in the park while Mark ... hard.
3. What ... when the car disappeared?
4. I ... at the park!
5. ... after the bus when the telephone rang?
6. Tony and Ann ... through the forest. The sun ... bright and the birds ... beautifully.
7. What ... when they came in?
8. Tom ... home when the rain began.
9. The children ... when their mother ... .
10. What ... when she called.