by Researchers are developing low-cost devices. These devices can detect water pollutants in rivers and lakes.
A. Researchers are developing low-cost devices that can detect water pollutants in rivers and lakes.
B. Researchers are developing low-cost devices to detect water pollutants in rivers and lakes.
C. Researchers are developing low-cost devices so that they can detect water pollutants in rivers and lakes.
D. Researchers are developing low-cost devices who can detect water pollutants in rivers and lakes.
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Đáp án: A
Dịch: Các nhà nghiên cứu đang phát triển các thiết bị giá rẻ có thể phát hiện các chất gây ô nhiễm nước ở sông hồ.
