STERLING

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Upgrade is an exciting new multi-level course for teenagers and young adults who are studying Englsih at A1 to C1 level of the Common European Framework of Referance. The series develops students' language level while capturing their interest and motivating them through real-life content...

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Upgrade is an exciting new multi-level course for teenagers and young adults who are studying Englsih at A1 to C1 level of the Common European Framework of Referance. The series develops students' language level while capturing their interest and motivating them through real-life content...

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