Student or Learner
By the time you will read this letter, we will already have left.
You've been studying Spanish for a long time, and I'm sure you're speaking fluently in a few month.
Whether we like it or not, within a few years biotechnology transforms every aspect of human life.
The underlined parts are not correct. I need the correct answers.
Are my answers correct? Specially the second and the third one (which one)?
2- will be speaking
3- will transform or will have transformed