Make full sentences using the Past Perfect Continuous and the Past Simple.

Dear Sam, How are you? You won't believe what 1) ...happened... to me last Saturday. I 2) ...was walking... along the beach with my dog, Sam, when he 3) ...spotted... something in the sand. He 4) ...started... dinning it up and waving his tail happily. It 5) ...turned... auickly 6).