Question

Read the passage and fill in the blanks with proper words (在短文的空格内填入适当的词，时期内容通顺，每空格限一词，首字母已给)

Coral reefs(珊瑚礁) live in warm, clear, shallow ocean habitat(生活环境) that are rich in life. The coral p 1. shelter(住处) for many animals in this complex habitat.

There are two t2.of coral, hard coral and soft coral. Hard corals have hard limestone skeleton(石灰岩构架)which form the basis of coral reefs. Soft corals do not build reefs.

Coral reefs g3. in shallow, warm water, usually n4. the land, and mostly in the tropics(热带). Coral prefers temperatures b5. 70 °F and 85°F. There are coral reefs off the eastern coast of Africa, off the southern coast of India in the Red Sea, and off the coasts of northeast and northwest Australia and on to Polynesia. There are a 6. coral reefs off the coast of Florida, USA, to the Caribbean, and down to Brazil.

The Great Barrier Reef(大堡礁)(off the NE Australia) is the l7. coral reef in the world. It is over 1,257 miles (2,000 km) long.

Answer 1