Tìm và sửa lỗi sai : 14. Water has been (A) vital to (B) the development (C) and survivor (D) of civilization. 15. Scientists believe there have (A) more than (B) 350,000 species of plants, but no one knows (C) for sure (D). 16. Animals and man (A) use the energy finding (B) in food to operate (C) their bodies (D) and muscles.

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