features: 15 actual tests are similar in form and content to those of the real ibt 15 actual tests consist of 10 real-level tests and 5 advanced-level tests tape scripts and clues are available in a separate reference book, which is also designed to help students study independently summary notes are provided and run parallel to each conversation/lecture to help students grasp key points and concepts glossary is provided to help students understand the definition of challenging words explanatory answers are provided, including analyses of correct and incorrect answers graphic organizer to help students comprehensively view the overall structure of the lecture.