5 (the children/study) while their nanny dinner? 6 While you came and (prepare) (be) out, the postman (deliver) these letters

5 While the children were studying, their nanny was preparing dinner?

6 While you were being out, the postman delivered these letters and came.

Ответ: 5 While the children were studying, their nanny was preparing dinner?; 6 While you were being out, the postman delivered these letters and came.