Do not skip the written exercises. The "new" PDF versions often include answer keys.
Sites like Sciarium often list files for the Student's Book (typically around 5-6 MB) for academic use.
Which would you like?
Do not skip the written exercises. The "new" PDF versions often include answer keys.
Sites like Sciarium often list files for the Student's Book (typically around 5-6 MB) for academic use.
Which would you like?
