Crows are probably the most frequen

Crows are probably the most frequently met and easily identifiable members of the native fauna of the United States. The great number of tales, legends, and myths about these birds indicates that people have been exceptionally interested in them for a long time. On the other hand, when it comes to substantive - particularly behavioral - information, crows are less well known than many comparably common species and, for that matter, not a few quite uncommon ones: the endangered California condor, to cite one obvious example. There are practical reasons for this.

Crows are notoriously poor and aggravating subjects for field research. Keen observers and quick learners, they are astute about the intentions of other creatures, including researchers, and adept at avoiding them. Because they are so numerous, active, and monochromatic, it is difficult to distinguish one crow from another. Bands, radio transmitters, or other identifying devices can be attached to them, but this of course requires catching live crows, who are among the wariest and most untrappable of birds.

Technical difficulties aside, crow research is daunting because the ways of these birds are so complex and various. As preeminent is generalists, members of this species ingeniously exploit a great range of habitats and resources, and they can quickly adjust to changes in their circumstances. Being so educable, individual birds have markedly different interests and inclinations, strategies and scams. For example, one pet crow learned how to let a dog out of its kennel by pulling the pin on the door. When the dog escaped, the bird went into the kennel and ate its food.

22. What is the main topic of the passage?

A. The ways in which crows differ from other common birds
B. The myths and legends about crows
C. The characteristics that make crows difficult to study
D. The existing methods for investigating crow behavior

23. According to the first paragraph, what evidence is there that crows have interested people for a long time?

A. The large number of stories about crows.
B. The frequency with which crows are sighted
C. The amount of research that has been conducted on crows
D. The ease with which crows are identified

24. The word 'comparable' in line 5 is closest in meaning to

A. interestingly
B. similar
C. otherwise
D. sometimes

25. In line 6, the author mention the endangered California condor as an example of a species that is

A. smaller than the crow
B. easily identifiable
C. featured in legends
D. very rare

26. In line 6, the author mentions the endangered California condor as an example of a species that is

A. crows
B. subjects
C. intentions
D. researchers

27. According to the second paragraph, crows are poor subjects for field research for all of the following reasons EXCEPT

A. They can successfully avoid observers.
B. They are hard to distinguish from one another
C. They can be quite aggressive.
D. They are difficult to catch.

28. In the second paragraph, the author implies that using radio transmitters would allow a researcher who studies crow to

A. identify individual crows
B. follow flocks of crows over long distances
C. record the times when crows are most active
D. help crows that become sick or injured

29. According to the third paragraph, which of the following is true about crows?

A. They seldom live in any one place for very long.
B. They thrive in a wide variety of environments.
C. They have marked preferences for certain kinds of foods.
D. They use up the resources in one area before moving to another.

30. In line 19,the word 'inclinations' is closest in meaning to

A. tricks
B. opportunities
C. preferences
D. experiences

31. In lines 19-21, the author mentions a pet crow to illustrate which of the following?

A. The clever ways that crows solve problems
B. The differences between pet crows and wild crows
C. The ease with which crows can be tamed
D. The affection that crows show to other creatures

32. Which of the following statements is supported by the passage?

A. Crows have relatively long lives.
B. Crows have keen vision
C. Crows are usually solitary
D. Crows are very intelligent.

Kết quả (Việt) 1:

Quạ có thể đáp ứng thường xuyên nhất và dễ nhận biết các thành viên của các loài động vật bản địa của Hoa Kỳ. Số lượng cổ tích, truyền thuyết và huyền thoại về các loài chim lớn chỉ ra rằng những người đã được đặc biệt quan tâm đến họ một thời gian dài. Mặt khác, khi nói đến nội dung thông tin - đặc biệt là hành vi -, quạ là ít nổi tiếng hơn so với nhiều loài comparably phổ biến, và cho rằng vấn đề, không phải là một vài cái khá phổ biến: condor California nguy cấp, để trích dẫn một ví dụ rõ ràng. Không có lý do thực tế này.Quạ đang nổi tiếng là người nghèo và tình tiết tăng nặng đối tượng cho lĩnh vực nghiên cứu. Quan tâm quan sát viên và những người học nhanh chóng, họ là sắc sảo về ý định của các sinh vật khác, bao gồm cả các nhà nghiên cứu, và lão luyện lúc tránh chúng. Bởi vì họ là như vậy rất nhiều, và đang hoạt động, đơn sắc, rất khó để phân biệt một crow từ khác. Ban nhạc, đàm hoặc các thiết bị nhận dạng khác có thể được đính kèm với họ, nhưng điều này tất nhiên đòi hỏi bắt sống quạ, người là một trong wariest và đặt untrappable của các loài chim.Technical difficulties aside, crow research is daunting because the ways of these birds are so complex and various. As preeminent is generalists, members of this species ingeniously exploit a great range of habitats and resources, and they can quickly adjust to changes in their circumstances. Being so educable, individual birds have markedly different interests and inclinations, strategies and scams. For example, one pet crow learned how to let a dog out of its kennel by pulling the pin on the door. When the dog escaped, the bird went into the kennel and ate its food.22. What is the main topic of the passage? A. The ways in which crows differ from other common birds B. The myths and legends about crows C. The characteristics that make crows difficult to study D. The existing methods for investigating crow behavior23. According to the first paragraph, what evidence is there that crows have interested people for a long time? A. The large number of stories about crows. B. The frequency with which crows are sighted C. The amount of research that has been conducted on crows D. The ease with which crows are identified24. The word 'comparable' in line 5 is closest in meaning to A. interestingly B. similar C. otherwise D. sometimes25. In line 6, the author mention the endangered California condor as an example of a species that is A. smaller than the crow B. easily identifiable C. featured in legends D. very rare26. In line 6, the author mentions the endangered California condor as an example of a species that is A. crows B. subjects C. intentions D. researchers27. According to the second paragraph, crows are poor subjects for field research for all of the following reasons EXCEPT A. They can successfully avoid observers. B. They are hard to distinguish from one another C. They can be quite aggressive. D. They are difficult to catch.28. In the second paragraph, the author implies that using radio transmitters would allow a researcher who studies crow to A. identify individual crows B. follow flocks of crows over long distances C. record the times when crows are most active D. help crows that become sick or injured29. According to the third paragraph, which of the following is true about crows? A. They seldom live in any one place for very long. B. They thrive in a wide variety of environments. C. They have marked preferences for certain kinds of foods. D. They use up the resources in one area before moving to another.30. In line 19,the word 'inclinations' is closest in meaning to A. tricks B. opportunities C. preferences D. experiences31. In lines 19-21, the author mentions a pet crow to illustrate which of the following? A. The clever ways that crows solve problems B. The differences between pet crows and wild crows C. The ease with which crows can be tamed D. The affection that crows show to other creatures32. Which of the following statements is supported by the passage? A. Crows have relatively long lives. B. Crows have keen vision C. Crows are usually solitary D. Crows are very intelligent.