13 Circle the correct words.
I saw the accident while I walked /was walking
to school.
1 A bus was coming along the road when a dog
ran/was running in front of it.
2 The driver saw / was seeing the dog and tried
to avoid it.
3 While the driver tried / was trying to avoid
the dog, he drove into a tree.
4 Some birds sat/were sitting in the tree and
they suddenly flew away.
5 I quickly got my mobile and phoned / was
phoning the emergency services.