II. Stress: (Dấu nhấn)
1. A. habitatB. underseaC. IndianD. Antarctic
2. A. oceanB. divideC. challengeD. fauna
3. A. eliminate B. minority C. conservation D. investigate
4. A. discoverB. endangerC. fertilizerD. contribute
5. A. floraB. carnivoreC. vegetationD. power