Упр.10 Юнит 2 Урок 678 Рабочая тетрадь ГДЗ Happy English Кауфман 10 класс

Correct the mistakes in the sentences.

1. They were friends since childhood.
2. How long has she written this book?
3. The boys are looking for the treasure for six months already.
4. I know her all my life.
5. What did they do since we left?

1. They have been friends since childhood.
2. How long has she been writing this book?
3. The boys have been looking for the treasure for six months already.
4. I have known her all my life.
5. What did they do since we had left?