Help me, please
Раскройте скобки в Present Perfect Continuous
1.They………. (study) very hard for their exams. 2.They…….(talk) about it all morning.3. My parents….(donate) to WWF for a long time. 4.A lot of animals ……(lose) their natural habitats recently. 5.We ……(use) solar power for ten years. 6. You look tired! ……….(you/work)in the garden all afternoon?