Listening Quiz: Điều Tra Sự Cố Kiểm Soát Chất Lượng – Easy Level

1. What is the main topic of the conversation?
2. What did William find when he checked the reagents?
3. What will Anna do to help solve the problem?
4. Why do William and Anna want to check the storage conditions?
5. What will likely happen after the new reagents are replaced?

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