1. To cover a. many mysteries of the undersea world 2. To provide b.our seafood responsibly 3. To reveal c.save sea animals 4. To make d.the interactions between teacher and students 5. To require e. a very low birth rate 6. To keep f.organizations to protect the oceans 7. To choose g. 75% of the earth's surface 8. To swim h. taking plastic bags to the beach 9. To have i. a balanced enviroment 10. To help j. in the horizontal position 11. To avoid k. a wide range of information 12. To join l. water clean
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