个人认为目前最好的CEFR系列的ESL（第二语言）教材，尤其是后四册。分级非常详细，B1+和B2+两级的过渡非常好。适合大部分学生。在学习其它听说读写专项教材之前踏踏实实学完这套教材的对应级别，可以打下非常坚实的基础。
Key Features
• Theme-based units from a wide variety of sources in five modules
• A variety of cross-cultural topics
• Systematic development of all four language skills through realistic
challenging tasks which encourage the learner´s personal
engagement
• Lexical exercises practising and activating all essential vocabulary
areas including collocations, idioms, phrasal verbs, fixed phrases
and word formation
• A varied range of reading texts from authentic contemporary
sources, with exercises which encourage learners to read
extensively as well as intensively
• Stimulating reading and listening tasks
• A wide range of speaking activities
• Writing analysis and practice on all types of writing with full
models
• Realistic, stimulating dialogues featuring people in everyday
situations
• Exam and study skills tips
• Progress Checks at the end of each module
• Practice in exam-style exercises for all five papers in the CAE exam
• Grammar sections covering all major grammatical areas and more
advanced grammar points, plus a Grammar Reference section
