Read the following passage about the return of Artificial Intelligence and mark the letter A, B, C or D on your answer
Read the following passage about the return of Artificial Intelligence and mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions from 23 to 30.
The race is on for the ultimate goal of renewable energy: electricity production at prices that are competitive with coal-fired power stations, but without coal’s pollution.
At the moment the front-runner in renewable energy is wind technology. According to Peter Bergin of Australian Hydro, one of Australia’s leading wind energy companies, there have been no dramatic changes in windmill design for many years, but the cumulative effects of numerous small improvements have had a major impact on cost.
While wind may currently lead the way, some consider a number of technologies under development have more potential. In several cases, Australia is at the forefront of global research in the area. Some of them are very site-specific, ensuring that they may never become dominant market players. On the other hand, these newer developments are capable of providing more reliable power, avoiding the major criticism of windmills - the need for back-up on a calm day.
Two other proposals for very different ways to harness sun and wind energy have surfaced recently. Progress continues with Australian company EnviroPower’s plans for Australia’s first solar chimney near Mildura, in Victoria. This year, Enviropower recognized that the quality of sunlight in the Mildura district will require a substantially larger collecting area than was previously thought. But besides saving in transmission costs, the new site will mean increased revenue from tourism and use of power for telecommunications.
The diversity of forms of greenhouse-friendly energy under development in Australia is remarkable. According to Richard Hunter of the AEA, ‘Australia has huge potential for wind, sun and wave technology. We should really be at the forefront, but the reality is we are a long way behind.’
(Adapted from IELTS READING 2)
The word they in paragraph 4 refers to_______.
Đáp án đúng là: B
Quảng cáo
Đáp án cần chọn là: B
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