Нужно подставить хвостик Mrs Smith cooked salad yesterday-1 She works at the factory-2
Здравствуйте, Никита.
Вы, наверно, под «хвостиком» имели в виду tag questions?
Mrs Smith cooked a salad yesterday, didn't she? (past simple)
She works at the factory, doesn't she? (present simple)
Успехов!