Chúng tôi xin giới thiệu phần trích dẫn nội dung của tài liệu đầu tiên trong bộ sưu tập Đề thi ViOlympic Tiếng Anh Lớp 12 - Đề thi số 25 dưới đây:
Đọc đoạn văn sau và trả lời các câu hỏi:
A team of Russian scientists has challenged the theory that the woolly mammoths became extinct 10,000 years ago at the end of the Ice Age. The scientists have reported that the beasts may have survived until 2000 B.C. on an island off the coast of Siberia, where researchers 5 uncovered 29 fossilized woolly mammoth teeth ranging in age from 4,000 to 7,000 years. The question to be asked now is, how did these prehistoric pachyderms survive in their island environment? One possibility is that they adapted to their confined surroundings by decreasing their bulk. This theory is based on their smaller tooth size, which 10 has led scientists to believe that they were only 6 feet tall at the shoulder compared with 10 feet of their full-sized counterpart. But would this be enough to enable them to survive thousands of years beyond that of other mammoths? Researchers are still working to uncover the reasons for this isolated group's belated disappearance.
1. With which topic is this passage mainly concerned?
(A) Some scientists have challenged a theory.
(B) Some small teeth have been discovered.
(C) Some mammoths lived longer than others.
(D) Some pachyderms survived on an island.
2. According to the passage, some researchers suggest that mammoths became extinct
(A) about 2,000 years ago
(B) about 4,000 years ago
(C) about 7,000 years ago
(D) about 10,000 years ago
Bộ sưu tập Đề thi ViOlympic Tiếng Anh Lớp 12 - Đề thi số 25
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