Помогите пожалуйста с английским языком!!! Кому не трудно объясните как это делать, я не совсем понимаю.

Choose the correct words.
1 Marlena's been in the Viennese Vegetable Orchestra for/since six years.
2 She's played the potato for August.
3  She's already/yet won a competition for her music.
4 I haven't heard vegetable music already/yet.
5 I've wanted to go one of her concerts for/since a long time.
6 I've just/yet bought a ticket.