Listening Quiz: Giải thích chi phí nâng cấp hạ tầng – Advanced Level

1. What is the main purpose of Anna’s explanation to William?
2. According to Anna, what will the new system reduce significantly?
3. What does Anna say will happen if the company waits to upgrade?
4. What can be inferred about William after hearing Anna’s explanation?
5. Why does Anna mention that the benefits should be seen within the first year?

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