Verb conjugation of "domare" in Italian

The third and forth largest economies in the world are growing due to the fact that the countries were investing large resources in education, including foreign language acquisition. English, in this case, was the dominant language.
My correction were added and highlighted with yellow markers and attached to this email. Tell me now if you have any questions about grammar rules, since I was a teacher 10 years ago.
For my future job it is important to speak English and to be able to write it. What are you studying at university? If you are not very busy, I'd be very happy if you write me.