Listening Quiz: Trình Bày Dải Sản Phẩm Đã Sửa Đổi – Advanced Level

1. What is the conversation mainly about?
2. What change did John make to the product range at Emma’s request?
3. How long was the warranty period extended?
4. What can be inferred about the items John removed from the range?
5. What will probably happen next?

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