помогите пожалуйста с заданием

1- was swimming
2-were watching
3-shouted
4-realised
5-said
6-sounded
7-looked
8-saw
9-swam
10.broke

We were all at the beach last Sunday at half past three. Our friend Mark was in the water. He 1 (was swimming) in the 800-metre race, and he was in first place. Lots of his schoolmates 2 (were watching) the race and they 3 (were shouting) his name: "Mark! Mark!" Suddenly, he 4 (realised) they 5 (were saying) something different. It 6 (sounded) like 'Shark! Shark! He 7 (looked) over his shoulder and 8 (saw) an enormous shark. Then Mark really 9 (swam) fast! He thinks he 10 (broke) the world record!