Listening Quiz: Kết Quả Giám Sát Cây Trồng Bằng Drone – Easy Level

1. How much land did the drones fly over last week?
2. What problem did Mark say some crop areas had?
3. What did Mark show Linda to identify the problem spots?
4. What did Mark say was causing the low health in those spots?
5. How often did Mark suggest flying the drones?

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