2. Her feet were aching because she ..... (walk) since early that morning.

Перевод задания: Её ноги болели, потому что она шла пешком с самого раннего утра.

Her feet were aching because she had been walking since early that morning.

Её ноги болели, потому что она шла пешком с самого раннего утра.

Ответ: had been walking