Задание 48878 ЕГЭ по английскому языку

An oasis can be quite small, only able to support a limited number of trees and to supply a little water for those who pass by. Other oases are big enough to supply considerable populations of people with ________ water. (DRINK)

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Oases are areas where trees and plants grow around a body of water in the middle of a desert. They are ________ phenomena because there is so little water or vegetation in desert areas. (USUAL)

How does the water in an oasis get there? It doesn’t come from the sky, but rather, from underneath the ground. Believe it or not, there are underground rivers and layers of rock which contain water beneath the ________ desert floor. (SAND)

Pressure from underneath these water sources pushes the water to the surface. In other cases, people have drawn the water out ________, through the use of man-made wells. (ARTIFICIAL)

People who survive on oases must be very ________ with how they use the water, because they must use it to grow food as well as to drink. (CARE)