Mark the letter A, B, C, or D on the answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

Câu hỏi

Wastewater is treated and turned into drinking water. This is done to ensure there is no shortage of fresh water.

Đáp án
C. To ensure there is no shortage of fresh water, wastewater is treated and turned into drinking water.

Câu hỏi thuộc Bài tập:

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