CHỌN TỪ TRÁI NGHĨA VỚI TỪ ĐƯỢC VIẾT HOA 1 Population growth rates VARY among regions and even among countries within the same region. A. restrain B. stay unchanged C. remain unstable D. fluctuate. 2 In some countries, the disease BURDEN could be prevented through environmental improvements. A. something to suffer B. something to entertain C. something said D. something enjoyable

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