Dưới đây là các câu trả lời cho những câu hỏi trong tài liệu mà bạn đã cung cấp:

### Trả lời câu hỏi
21. **How long was Sarah's holiday?**
**C. Nine days.**

22. **What was the weather like that day?**
**B. Warm and sunny.**

23. **The instructor gave Sarah the piece of rope**
**D. as a piece of safety equipment.**

24. **Sarah thought**
**B. avalanches in the area were very small.**

25. **What did Sarah think she could do if there was an avalanche?**
**A. Call for help on her cell phone.**

### Sắp xếp từ
26. **A safe place / An escape plan / you know / how to / will help / get outside / and go to.**
**You know how to get outside and go to a safe place / an escape plan will help.**

27. **During / to minimize / Make sure / you know / that / the disaster / what to do / the damage.**
**Make sure you know what to do during the disaster to minimize the damage.**

28. **Most / tropical storm / disaster / in / natural / is / common / Vietnam / the/?**
**Is the most common natural disaster in Vietnam a tropical storm?**

### Viết lại câu
29. **Follow the escape plan strictly and you will be safe. (IF YOU)**
**If you follow the escape plan strictly, you will be safe.**

30. **It's necessary for everyone to put important belongings into a safe bag. (SHOULD)**
**Everyone should put important belongings into a safe bag.**

Hy vọng các câu trả lời này giúp ích cho bạn!