Official Cambridge Guide to IELTS
+ Easy to understand instructions
+ Improves IELTS key skills
+ Very well written with logical assignments
+ DVD-Rom with interactive lessons
+ Can be expensive ($45 retail but much cheaper used)
+ Lots of practice exams included at the end
- Takes a long time to complete
- Some activities are repetitive
- Some activities are also available for free online
- Have to write answers on separate sheet
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