Page 22 - Course Packet for Reading
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According to the much debated theory proposed by father-son team Luis and
Walter Alvarez in 1980, an asteroid or comet slammed into the earth at the end of
the Cretaceous period 65 million years ago, spewing so much dust into the
atmosphere that sunlight was blocked for months. Temperatures plummeted,
plants withered and many species of life, including the mighty dinosaurs, perished
en masse.
9. From the passage, the word “plummeted” means ________.
1. dropped sharply 2. increased highly
3. remained constant 4. varied continuously
Many U.S. doctors believe that the evidence against alcohol is so strong that there
should be strict warnings. But others disagree and doubt that warning signs are
justified.
10. The word “justified” means ________.
1. strict 2. invalidated
3. reasonable 4. weakened
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