2017托福100篇阅读理解试题（三十九）_第2页

　　6. It can be inferred from the passage that brain size is assumed to

　　(A) be an indicator of cognitive ability

　　(B) vary among individuals within a species

　　(C) be related to food consumption

　　(D) correspond to levels of activity

　　7. Why are otters and mussel shells included in the discussion in paragraph 3?

　　(A) To provide an example of tool use among animals

　　(B) To prove that certain species demonstrate greater ability in tool use than other species

　　(C) To illustrate how otters are using objects as tools

　　(D) To demonstrate why mother chimpanzees show their young how to use tools

　　8. The word "rudimentary" in line 20 is closest in meaning to

　　(A) superior

　　(B) original

　　(C) basic

　　(D) technical

　　9. It can be inferred from the statement about mother chimpanzees and their young (lines 20-22) that young chimpanzees have difficulty

　　(A) communicating with their mothers

　　(B) adding quantities

　　(C) making choices

　　(D) opening hard nuts

　　10. The phrase "the one" in line 24-25 refers to the

　　(A) study

　　(B) pair

　　(C) chimpanzee

　　(D) ability

　　11. Scientists concluded from the experiment with chimpanzees and chocolate chips that chimpanzees

　　(A) lack abilities that other primates have

　　(B) prefer to work in pairs or groups

　　(C) exhibit behavior that indicates certain mathematical abilities

　　(D) have difficulty selecting when given choices

　　参考答案：BDBDC AACDB C