11. A. **saw** - I saw Maria for the first time at the Heart-to-Heart Charity Office.
12. A. **were mending - was pouring** - We were mending the roof for Mrs. Smith, an elderly childless woman, when it was pouring with rain.
13. C. **was making - entered** - I was making my report when my boss entered the hall.
14. A. **broke - was playing** - Jim broke his leg when he was playing golf.
15. C. **improve** - Both CARE and Oxfam organisations have programmes to help people in underdeveloped countries improve their lives.
16. B. **was waiting - was having** - While I was waiting for him to call up, he was having a good time in the bar.
17. A. **were doing - arrived** - All the kids were doing their homework when the volunteer team arrived.
18. C. **was going - lost** - While Lauda was going round a corner, he suddenly lost control of his Ferrari.
19. A. **met - was working** - When I met my best friend, she was working as a voluntary teacher in Dream Homeless Shelter.
20. B. **were walking - asked** - We were walking in silence when he suddenly asked to help him.
21. C. **were - going - saw** - Where were you going when I saw you on the bus last night?
22. D. **rang - was working** - When you rang yesterday, I was working in the garden, so I didn’t hear the phone.
23. D. **happened - was sleeping** - When the robbery happened, the safeguard was sleeping.
24. D. **was going - hit** - While the Cambridge boat was going under a bridge, it hit another boat.
25. B. **saw - was waiting** - I saw the accident while I was waiting for the bus.
26. A. **found - dug** - We found an old box while we dug in the garden.
27. A. **came - were reading** - When I came into the room, two boys were reading a picture book together.