The Collectors

The word “it” in the second paragraph refers to_____________

Câu hỏi: Read the following passage and choose A, B, C or D to indicate the correct answer to each of the following questions from 38 to 42.
In this era of increased global warming and diminishing fossil fuel supplies, we must begin to put a greater priority on harnessing alternative energy sources. Fortunately, there are a number of readily available, renewable resources that are both cost- effective and earth - friendly. Two such resources are solar power and geothermal power.
Solar energy, which reaches the earth through sunlight, is so abundant that it could meet the needs of worldwide energy consumption 6,000 times over. And solar energy is easily harnessed through the use of photovoltaic cells that convert sunlight to electricity. In the us alone, more than 100, 000 homes are equipped with solar electric systems in the form of solar panels or solar roof tiles. And in other parts of the world, including many developing countries, the use of solar system is growing steadily.
Another alternative energy source, which is abundant in specific geographical areas, is geothermal power, which creates energy by tapping heat from below the surface of the earth. Hot water and steam that are trapped in underground pools are pumped to the surface and used to run a generator, which produces electricity. Geothermal energy is 50,000 times more abundant than the entire known supply of fossil fuel resources and as with solar power, the technology needed to utilize geothermal energy is fairly simple. A prime example of effective geothermal use in Iceland, a region of high geothermal activity where there are over 80 percent of private homes, are heated by geothermal power.
Solar and geothermal energy are just two of promising renewable alternatives to conventional energy sources. The time is long overdue to invest in the development and use of alternative energy on global scale.
The word "it" in the second paragraph refers to_____________
A. solar energy
B. the earth
C. sunlight
D. energy consumption
Câu hỏi. Từ "it" nằm ở đoạn 2 thay thế cho từ nào?
Các phương án khác.
A. năng lượng mặt trời
B. trái đất
C. ánh nắng
D. mức tiêu thụ năng lượng.
Đây là câu hỏi suy luận về đại từ dùng để thay thế cho danh từ đã xuất hiện phía trước nhưng không muốn nhắc lại danh từ đó. Ta xem lại câu chứa từ "it":
Solar energy, which reaches the earth through sunlight, is so abundant that it could meet the needs of worldwide energy consumption 6,000 times over. Năng lượng mặt trời, nguồn năng lượng mà tới trái đất thông qua ánh nắng, là nguồn năng lượng cực dồi dào đến mức mà có thể đáp ứng được nhu cầu sử
dụng năng lượng của toàn thế giới gấp tận 6000 lần.
"Nó" ở đây là năng lượng mặt trời, đáp án A.
Đáp án A.
 

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