Where will Ms Hoa and the class go for their field trip ?, Ha Long Bay, Phong Nha Cave, Nha Trang Beach, why does Ms.Hoa tell Nam not to take stalactites?, They are dangerous, They take a long time to form, They are too heavy, why does Ms.Hoa advise students not to bring too many snacks?, To reduce litter , To save money, To stay healthy , How can students make the trip more eco-friendly?, Buy many souvenirs , Bring snacks with less packaging, Bring more plastic bags, What should students do during the trip?, Leave litter behind, Take things from the cave , Protect the environment .

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