back up - support, flick through - look at a book or magazine quickly, gems of - very special or beautiful, homespun (ideas) - simple and ordinary , upbeat (attitude) - positive, (walk) cautiously - carefully, weigh in on a conversation - give your opinion during a discussion, validated - proved as true, to compile  - make a book or list by bringing together different pieces of information, to implement - put an agreement into effect or practice,

GOLD EXPERIENCE B2+ UNIT 5 Reading pp. 64-65

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