I’ve updated the grammar and writing pages for B1 and B2. On the main page of “Grammar and Writing” – found on the right-hand side of the “Resources” page (look at the top of this page) you will see a link to an on-line book called “Elements of Style” by Strunk and White. It’s old, but does cover the basics of English language writing style. Check it out BEFORE you write your thesis!
Have a great day!