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Câu hỏi: Read the following passage and blacken the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks in the following question.
The science of studying birds or ornithology most likely dates back to human’s fascination (21) ___________flight. In the United States, some of the earliest recorded observations can be linked to the American naturalist and painter John James Audubon, in the early 1800s, tied threads to birds’ legs as a means to identify individuals. A century later, scientists affiliated with the Smithsonian Institution used metal bands as a means of identifying individual herons. If and when the herons were recaptured, the bands provided data on the individual birds. This method is known as mark and recapture. It is still used to (22) __________ the abundance of a population as well as track the movement of individuals.
Modern technology has provided an ever-increasing number of ways to gather data on bird populations and individuals. Electronic tracking devices were once limited to the larger breeds of birds like Trumpeter Swans and Wandering Albatrosses (23) _______ the size of transmitters. The rule of thumb was that birds not be outfitted with transmitters (24) _________exceeded 3-5% of the bird’s body weight. Researchers needed some form of transportation to carry the cumbersome equipment. The emergence of transmitters that utilised the ARGOS satellite network in 1984 revolutionised ornithological studies. More recently, the development of lightweight sensors like geolocators that record light (25) ___________ and the even smaller nanotags that emit radio signals have led to the automation of radio telemetry.
A. who
B. that
C. what
D. where
The science of studying birds or ornithology most likely dates back to human’s fascination (21) ___________flight. In the United States, some of the earliest recorded observations can be linked to the American naturalist and painter John James Audubon, in the early 1800s, tied threads to birds’ legs as a means to identify individuals. A century later, scientists affiliated with the Smithsonian Institution used metal bands as a means of identifying individual herons. If and when the herons were recaptured, the bands provided data on the individual birds. This method is known as mark and recapture. It is still used to (22) __________ the abundance of a population as well as track the movement of individuals.
Modern technology has provided an ever-increasing number of ways to gather data on bird populations and individuals. Electronic tracking devices were once limited to the larger breeds of birds like Trumpeter Swans and Wandering Albatrosses (23) _______ the size of transmitters. The rule of thumb was that birds not be outfitted with transmitters (24) _________exceeded 3-5% of the bird’s body weight. Researchers needed some form of transportation to carry the cumbersome equipment. The emergence of transmitters that utilised the ARGOS satellite network in 1984 revolutionised ornithological studies. More recently, the development of lightweight sensors like geolocators that record light (25) ___________ and the even smaller nanotags that emit radio signals have led to the automation of radio telemetry.
A. who
B. that
C. what
D. where
Mệnh đề quan hệ (Relative clause):
Dùng đại từ “that” làm chủ ngữ thay thế cho danh từ chỉ vật đứng trước (transmitters).
Tạm dịch:
The rule of thumb was that birds not be outfitted with transmitters that exceeded 3-5% of the bird’s body weight. (Quy tắc chung là không được trang bị cho chim những chiếc máy phát vượt quá 3-5% trọng lượng cơ thể của chim.)
Dùng đại từ “that” làm chủ ngữ thay thế cho danh từ chỉ vật đứng trước (transmitters).
Tạm dịch:
The rule of thumb was that birds not be outfitted with transmitters that exceeded 3-5% of the bird’s body weight. (Quy tắc chung là không được trang bị cho chim những chiếc máy phát vượt quá 3-5% trọng lượng cơ thể của chim.)
Đáp án B.