Ответ:

1.Вторично использовать 2.Отходы производства 3.Живая природа 4. Потребитель 5.Наличние деньги 6.Обечпечивать 7.Isnt it? 8 Can you? 9.Didnt he? 10. Doesnt she? 11.We have been cleaning 12.Have been working 13. Did 14. Talked 15. Have been learning