When Tom went to medical school, he already …… a lot of books on anatomy

When Tom went to medical school, he had already read a lot of books on anatomy. Когда Том пришел в медицинскую школу, он уже прочитал много книг по анатомии.When Tom went to medical school (Past Simple Tense). He had already read a lot of books on anatomy (Past Perfect Tense)