6. the children (cook) dinner? No, she

1. Вспомним структуру Present Continuous: to be + Ving (глагол с окончанием -ing).

2. Для подлежащего the children используем форму to be: are.

3. Добавим окончание -ing к глаголу cook: cooking.

4. Для подлежащего she используем форму to be: is not / isn't.

5. Получим предложение: Are the children cooking dinner? No, she isn't. She is on a new dress.

Ответ: Are the children cooking dinner? No, she isn't. She is on a new dress.