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Câu 638 : The word it in paragraph 3 refers to ______. A. technology designed to extract resources from the soil. B. frozen water discovered...
Đề bài
Câu 638 :
The word it in paragraph 3 refers to ______.
A. technology designed to extract resources from the soil.
B. frozen water discovered beneath the Martian surface.
C. purification processes used to create safe drinking water.
D. water that must be processed for human survival. Đáp án đúng là: B
