Пожалуйста помогите с английским срочно...........4.Complete the sentences. Use past simple

Пожалуйста помогите с английским срочно...........
4.Complete the sentences. Use past simple or past perfect.
1) When I(meet) John, I(understand) that I(see) him before. 2) When the second group of tourists(arrive) in London, the first group(already leave). 3) They(go) home after the film(finish). 4) She(tell) us about the places she(see) while was travelling in England. 5) The children(go) to the skating rink as soon as they(return) from the museum. 6) Mike(play) ten games by the end of the season. 7) Sue(like) the new game though she never(play) it before. 8) By the end of the Olympic Games the national team(win) 12 medals