Ships are often sunk in order to create underwater reefs （暗礁） perfect for scuba diving （水肺式潜泳） and preserving marine __1__.
举一反三
- Which of the following activities will negatively influence animals？（ ） A: hunting B: wildlife observation C: swimming with dolphins D: scuba diving on reefs
- Alfredo has gone scuba diving before.
- How many steps are mentioned concerning scuba diving?
- 2. How long did it take Chris to get a scuba diving license?
- What will Bob mostly be doing on his trip to St. Lucia? A: Reading and scuba diving. B: Scuba diving and motocycling with Gloria. C: Accompanying Gloria on shopping and dancing. D: Doing whatever pleases Gloria.