ПОМОГИТЕ С АНГЛИЙСКИМ СРОЧНО!! Поставьте глагол в нужную форму (Действительный залог)

1) They are busy now, they (to discuss) an important problem.
2) They (to discuss) it since two o’clock.
3) Both grown-ups and children (to be) fond of playing computer games.
4) My friend (to have) a good ear for music.
5) He (to play) the piano since five years old.
6) Look! The boys (to break) the window and now they are running away.
7) Let’s go, the train already (to arrive).
When you (to visit) our city for the first time?
9) He (to collect) thousands of stamps with pictures of famous people before he gave up philately.
10) You shouldn’t speak loudly when you (to fish)