Eyad Darras suggests two resources, with accompanying exercises, that can help improve your vocabulary for your IELTS test and general English.
Author: Eyad Darras, Language Assessment Consultant, British Council China
IELTS Speaking: Opinionated discourse markers
A very important part of the fluency and coherence assessed in the IELTS speaking test are words and phrases called discourse markers. The term may sound complicated but the idea is simple: discourse markers are words and phrases we use to move through conversations, going from one idea to the next, to introduce new topics or return to old ones.