4This invaluable little book highlights the real mistakes that students make in the exam - and shows how to avoid them. Based on analysis of thousands of exam scripts, each unit targets a key problem area. Clear explanations and exercises help students to use the language accurately. Regular tests offer students a further opportunity to check and consolidate what they have learnt. * Highlights common mistakes that learners really make * Based on analysis of thousands of exam scripts * Short, snappy explanations focus on key problem areas * Includes exam-style exercises