Collins: Cobuild Key Words For Ielts Book 2 Improver Pdf !link!

"If something is , it is able to continue over a long period of time without harming the environment or using up resources."

To improve fluency and accuracy, the book provides hundreds of synonyms and collocations (words that naturally go together), helping students sound more like native speakers. Why Students Use It Collins Cobuild Key Words For Ielts Book 2 Improver Pdf