Read the following passage and mark the letter A, B, C, D on our answer sheet to indicate the correct answer to each of the questions
The time when human crossed the Arctic land bridge from Siberia to Alaska seems remote to us today, but actually represents a late stage in the prehistory of humans, an era when polished stone implements and bows and arrows were already being used and dogs had already been domesticated
When these early migrants arrived in North America, they found the woods and plains dominated by three types of American mammoths. These elephants were distinguished from today’s elephants mainly by their thick, shaggy coats and their huge, upward-curving tusks. They had arrived on the continent hundreds of thousands of years before their followers. The woody mammoth in the North, the Columbian mammoth in middle North America, and the imperial mammoth of the South, together with their distant cousins the mastodons, dominated the land. Here, as in the Old World, there is evidence that humans hunted these elephants, as shown by numerous spear points found with mammoth remains
Then, at the end of the Ice Age, when the last glaciers had retreated, there was a relatively sudden and widespread extinction of elephants. In the New World, both mammoths and mastodons disappeared. In the Old World, only Indian and African elephants survived.
Why did the huge, seemingly successful mammoths disappear? Were humans connected with their extinction? Perhaps, but at that time, although they were cunning hunters, humans were still widely settled and not very numerous. It is difficult to see how they could have prevailed over the mammoth to such an extent
The passage supports which of the following conclusions about mammoth
A. Humans hunted them to extinction
B. The freezing temperatures of the Ice Age destroyed their food supply
C. The cause of their extinction is not definitely known
D. Competition with mastodons caused them to become extinct
Đáp án C
Đoạn văn ủng hộ kết luận nào sau đây về moi ma mút?
Đáp án C – Nguyên nhân về sự tuyệt chủng của chúng không chắc chắn được biết đến
Dẫn chứng – Câu 1 – 2 – Đoạn cuối: Why did the huge, seemingly successful mammoths disappear? Were humans connected with their extinction?
Tạm dịch: Tại sao những con ma mút khổng lổ có vẻ biến mất thành công như vậy? Có phải con người có liên quan đến sự tuyệt chủng của chúng?
=> Chúng ta thấy sự tuyệt chủng của chúng dường như chúng ta thấy không rõ ràng nguyên nhân vì sao?
Các đáp án khác
A – Con người đã săn bắn chúng đến tuyệt chủng
B – Nhiệt độ đóng băng của Kỷ bang hà đã phá hủy sự cung cấp lương thực của chúng
D – Sự canh trạnh với voi rang mấu là nguyên nhân khiến chúng trở nên tuyệt chủng.