Решение:
Для выполнения задания необходимо раскрыть скобки, поставив глагол в Past Simple, учитывая отрицательную форму.
- Mother did not cook apple pie yesterday.
- Granny did not water the flowers two hours ago.
- They did not wait me last time.
- Her friends did not visit their grandparents last summer.
- Our dog did not want to go for a walk.
- My parents did not thank my teacher yesterday.
Ответ: did not cook; did not water; did not wait; did not visit; did not want; did not thank.