10. When I

a. met

11. While I

David he was very tired.

b. was meeting

c. had met

through the report I found a mistake.

b. was looking

a. looked 12. He for a few hours through the forest before he reached the

c. had looked

village.

b. was walking

a. walked she a new dress for birthday party yesterday. 13.

c. had been walking

a. Did

buy

b. Was buying c. Had____bought​