Yes, but only for disciplined students who promise to attempt every exercise first.
Use the answer key as a checking tool , not a shortcut. For deeper learning, pair it with a free grammar site (like British Council LearnEnglish) for explanations. Gateway B1 Student 39-s Book Answers Unit 5
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❌ Learning the concepts for the first time. You still need the original textbook, a teacher, or a grammar guide. Yes, but only for disciplined students who promise