The grammar presented is based on the grammar of written and spoken English as it is used in college lectures, textbooks, academic essays, high school classrooms, and coversations between instructors ...
Our innovative products and services for learners, authors and customers are based on world-class research and are relevant, exciting and inspiring. We unlock the potential of millions of people ...
PDF files have become a major part of our digital lives in this cross-platform world. While simply viewing or commenting on a PDF can be accomplished with free software, there are times when we ...