Developing skills for the toefl ibt transcript part 9

Chia sẻ: Tran Anh Phuong | Ngày: | Loại File: PDF | Số trang:13

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Developing skills for the toefl ibt transcript part 9

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These days, infectious diseases are not as prevalent as they were in the past. Back in the 19'" century, they were very prevalent. For example, one widespread problem in the 1800s was babies who got diarrhea from infections. These infections came from drinking dirty water or drinking unpasteurized milk.

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