1 . Dead v__________ will never be dangerous again because they are completely extinct.

2 . All the ___________（火山）in the country erupted ten times last year, killing about 800 people. （根据汉语提示单词拼写）

3 . Located at the foot of a v_________, the village has developed dendrobium, a traditional Chinese herbal medicine.（根据首字母填空）