2 I was seeing 7 (saw) a friendly dog while I was walking walked to work today.

2. I was seeing / saw a friendly dog while I was walking / walked to work today.

В данном предложении необходимо выбрать правильную форму глагола. Первая часть: I saw a friendly dog (я увидел дружелюбную собаку) - однократное действие в прошлом. Вторая часть: I was walking to work (я шёл на работу) - длительное действие в прошлом.

Ответ: I was seeing / saw a friendly dog while I was walking / walked to work today.