Title [HS] ĐỌC HIỂU ĐIỀN TỪ.docx ✅

D. examining 4. (4) A. confused. B. linked. C. limited. D. transformed 5. (5) A. discourage. B. enable. C. deprive. D. compete 3. THE MYSTERY OF DINOSAUR EXTINCTION Dinosaurs ruled the Earth for over 160 million years, evolving into a vast array of species that adapted to every environment, from lush forests to arid deserts. However, around 66 million years ago, they abruptly disappeared in a mass extinction event that (1)________ the end of the Mesozoic Era. For decades, scientists have debated the cause of this sudden extinction. The most widely accepted theory attributes it to a massive asteroid impact near what is now the Yucatán Peninsula in Mexico. This cataclysmic collision is believed to have generated enormous dust clouds that (2)________ sunlight from reaching the Earth’s surface, disrupting photosynthesis and collapsing ecosystems. However, some researchers argue that volcanic activity in the Deccan Traps of present-day India may have been an equally significant contributor. These prolonged eruptions released immense quantities of sulfur dioxide and carbon dioxide into the atmosphere, altering the global climate. It’s possible that the asteroid merely (3)________ the final blow to an already fragile biosphere. The extinction of dinosaurs cleared the way for mammals to flourish, eventually giving rise to human beings. But many questions still remain. For instance, why did some species like birds, which are now recognized as living descendants of dinosaurs, manage to survive while others (4)________? Understanding these patterns helps paleontologists draw connections between past and present extinction events. Today, the study of dinosaur fossils has been transformed by technology. CT scanning, isotope analysis, and 3D modeling allow scientists to reconstruct behavior, physiology, and evolutionary relationships with remarkable precision. Each fossil discovery adds a piece to the puzzle, (5)________ us closer to unlocking one of Earth’s greatest mysteries. 1. (1) A. indicated. B. marked. C. reached. D. traced 2. (2) A. shielded. B. reflected.