ข้อที่ 4. Scientists are excited about their latest deep sea discovery which could be great important to mankind. Recent exploration of life in the deepest parts of the South Pacific is revealing marine life ___1___. The special equipment that permits the study of the sea bed ___2___ creatures with such unusual features ___3___ scientists are not able to relate ___4___ to any known species. And this phenomenon is not restricted to ___5___ examples. Marine biologists who are involved in the depths claim that ___6___ thousands of new species of fish and marine plant life to be discovered, many of ___7___ might be of benefit to man ___8___ exciting new pharmaceutical products. However, ___9___ new forms of marine life are being discovered, others are being destroyed. The ___10___ of coral reefs could be dangerous to the ecosystem.