Toefl C1

Future House Languages S.L

Activate Advanced C1: A Complete Self-Study Course

Cambridge English

The Official Cambridge Guide to IELTS Student's Book with Answers with DVD-ROM [Lingua inglese]

Independently published

TOEFL iBT Vocabulary Builder for Score 90+: Higher-Level TOEFL Words, Expressions, Phrases & Idioms

Collins

Grammar: C1                                      

McGraw-Hill Education

The official guide to TOEFL iBT test            

Prosperity Education

English Collocations in Context: Essential English grammar for B2 and C1 students

Next Level English C1 Advanced: 50 lessons to improve your English conversation: Real-world vocabulary and grammar for speaking success (English Edition)

Prosperity Education

Listening C1: Six practice tests for the Cambridge C1 Advanced: Answers and audio included

Future House Languages S.L

Activate Upper-Intermediate B2: A Complete Self-Study Course: Improve your English level in all the skills and pass your Cambridge B2, IELTS, Trinity or ... (Activate Your English™) (English Edition)

Independently published

B2-C1 ENGLISH VOCABULARY AND GRAMMAR BOOSTER: PRACTICE ACTIVITIES FOR ENGLISH STUDENTS