Анонимно

Предложение: For example, many children *пропуск* stay at school because they had to work from a young age.
Вопрос: Что вставить в пропуск из трёх вариантов: couldn't/weren't/will be able?​

Ответ

Анонимно

Many children couldn't stay at school because they had to work from a young age.