Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions from 34 to 40.

The time when humans crossed the Arctic land bridge from Siberia to Alaska seems remote to us today, but actually represents a late stage in 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 woods and plains dominated by three types of American mammoths. Those 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 human followers. The wooly 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 the time, although they were hunters, humans were still widely scattered and not very numerous. It is difficult to see how they could have prevailed over the mammoth to such an extent.

With which of the following is the passage primarily concerned?

• A. Techniques used to hunt mammoths.
• B. The relationship between man and mammoth in the New World.
• C. The prehistory of humans.
• D. Migration from Siberia to Alaska.

• Câu 2: Mã câu hỏi: 44611

  It can be inferred that when humans crossed into the New World, they ________.

  • A. had previously hunted mammoths in Siberia
  • B. had never seen mammoths before
  • C. brought mammoths with them from the Old World
  • D. soon learned to use dogs to hunt mammoths

• Câu 3: Mã câu hỏi: 44612

  The phrase “these early migrants” in paragraph 2 refers to ________.

  • A. mammoths
  • B. humans
  • C. dogs
  • D. mastodons

• Câu 4: Mã câu hỏi: 44613

  The passage supports which of the following conclusions about mammoths?

  • 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.

• Câu 5: Mã câu hỏi: 44614

  The word “implements” in paragraph 1 is closest in meaning to ________.

  • A. tools
  • B. ornaments
  • C. houses
  • D. carvings

• Câu 6: Mã câu hỏi: 44615

  Where were the imperial mammoths the dominant type of mammoth?

  • A. Alaska
  • B. the central portion of North America
  • C. the southern part of North America
  • D. South America

• Câu 7: Mã câu hỏi: 44616

  Which of the following could best substitute for the word “remains” in paragraph 2?

  • A. bones
  • B. drawings
  • C. footprints
  • D. spear points