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Read the following passage about Boyan Slat's Revolutionary Approach to Ocean Cleanup and mark the letter A, B, C or D on your answer sheet...

Đề bài

Read the following passage about Boyan Slat's Revolutionary Approach to Ocean Cleanup and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 18 to 22.

Boyan Slat's revolutionary vision for oceanic restoration emerged during his teenage years following a transformative diving experience in Greece. (18)_________, humanity might have continued ignoring this environmental crisis indefinitely. His subsequent establishment of The Ocean Cleanup at eighteen demonstrated remarkable entrepreneurial courage. System 001, the organization's pioneering device, (19)_________, represents a technological breakthrough in marine conservation. The innovation employs sophisticated floating barriers equipped with underwater skirts designed to intercept debris while preserving aquatic ecosystems.

The challenge extends beyond mere collection; the retrieved materials require sustainable processing. Transportation logistics, recycling infrastructure, and market development for recovered plastics pose formidable obstacles. His groundbreaking proposition, (20)_________, reflects visionary environmental leadership rivaling established conservationists. These microscopic fragments infiltrate food chains irreversibly, threatening both marine biodiversity and human health. His ambitious scaling strategy envisions deploying numerous autonomous systems throughout global garbage patches.

Critics question economic viability and potential ecological disruptions, yet supporters emphasize urgency given accelerating pollution rates. Prevention remains paramount; cleanup constitutes damage control. (21)_________. Whether this approach achieves meaningful impact depends on technological refinement, funding sustainability, and international cooperation. Nevertheless, Slat's initiative has catalyzed global awareness, (22)_________.

https://time.com/am

Question 18:

A. Had the young inventor not witnessed such overwhelming plastic contamination beneath the waves

B. The cleanup systems, which exclusively targeted microscopic particles instead of larger plastic debris

C. Having dismissed the environmental crisis after brief underwater exploration without serious concern

D. The young inventor, whose primary focus remained on theoretical research without practical action

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