: This is a comprehensive coursebook for learners targeting university-level English.
: It includes 35 units of study across all skills, 1,300 questions, and an MP3 CD with over 11 hours of audio. Toefl Delta Amazon
: Instructors often praise its layout for having clear explanations and numerous supporting illustrations that break down complex question types. : This is a comprehensive coursebook for learners
: For those focusing on simulation, Delta offers specific books like Six Practice Tests and Seven Practice Tests . Toefl Delta Amazon
: Designed for intensive preparation, this version typically covers about 15 weeks of study.