Решение:
- He did the dishes and then he put them back in the cupboard. (Прошедшее время глагола 'do' - делать)
- He takes a reusable bag with him when he goes shopping because he wants to save plastic. (Глагол 'save' - экономить, сохранять, подходит по смыслу)
- I don't know how much the designer bag costs - it doesn't look cheap! (Глагол 'cost' - стоить, в Present Simple, 3 лицо ед.ч.)
- She has kept a diary for years. She writes down her daily thoughts and ideas. (Глагол 'keep' - вести (дневник), в Present Perfect, так как действие началось в прошлом и продолжается)
- I used to play hockey and one of the best things was that I felt part of a team. (Глагол 'feel' - чувствовать, в прошедшем времени)
- I have two brothers and in my family we do on the washing four times a week. (Глагол 'do' - делать, в Present Simple, так как это регулярное действие)
Ответ: did; save; costs; kept; felt; do.