Question

Answer 1

1 having dinner while they were listening to the radio

2 started when she was sleeping

3 were you doing when it began to rain

4 the farmer was ploughing the field, he started whistling

5 they were doing when you came

6 happening when she came

7 came in when she was reading a book 

8 erupted while they were working in the field

9 hit the town when it was leaving the harbor

10 Someone hit the headmaster on the head while he was going to his car