Complete the sentences. Use past simple or past perfect.1) When I

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 she was travelling in England. 5) The children (go) to the skating rink as soon as the (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.
Помогите. Безотлагательно надо!!