Помогите пожалуйста!

1. Open the brackets and use the correct form of the verb.
1) We (see) him before they (make) friends with him.
2) I already (get) home before it (begin) to rain.
3) There (be) a new painting that I (not see) before.
4) Captain Cook (discover) the island before he (die).
5) Bob (eat) all the cakes before Sam (come) home.