The scientists’ findings could give humans a hand. Some marine life is used in medicine. Researchers can also study how the creatures deal with pollution and climate change. That might give scientists ideas on how people could better adapt, or change. Knowing what creatures live in oceans is important, scientists say, because one-third of the world’s coral reefs are endangered. “If we don’t know what is present in the first place, how are we ever going to protect it properly?” asks Hendricks. “Learning about new species is an important step.”

　　5. What’s the main idea of the passage?

　　A. Scientists find surprises in the Great Barrier Reef.

　　B. Soft Coral no longer remains a mystery.

　　C. Scientists left 36 plastic houses to the ocean floor.

　　D. Scientists made explorations to deal with ocean pollution.

　　6. According to the passage, what makes the study of the soft coral a big challenge?

　　A. The diversity of the soft coral.

　　B. Many unknown species.

　　C. The similar appearance.

　　D. Various shapes and colors.

　　7. What does the writer mean by “That might give scientists ideas on how people could better adapt, or change.”(Para.5) ?

　　A. Ocean species may be of great medical value in the future.

　　B. A study of ocean creatures’ adaptation may assist scientists in their research.

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