31 Which of the following can be the best title of the passage?
(A) The Solution to World Hunger.
(B) The Brave New World of Human Civilization.
(C) The Future of Genetically Engineered Foods.
(D) The Mysteries of Human Organisms.
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統計: A(4), B(7), C(50), D(2), E(0) #3564543
統計: A(4), B(7), C(50), D(2), E(0) #3564543