Решение #
1) were sitting (сидели), came (пришел);
2) was sending (посылал), saw (увидел);
3) was hugging (обнимал), opened (открылась);
4) was walking (шла), met (встретила);
5) were watching television (смотрели), left (ушел);
6) were leaving (уезжали), saw (увидели);
7) were playing (играли), came (вышли);
8) were doing (осматривали), began (начался).