Ngữ Pháp và Từ Vựng
Synthetic products are made from chemicals or artificial substances.
A. natural B. made by machine C. man-made D. unusual
![](https://image.exam24h.com/public/2019/04/27/1052_7aac21b01db4e7fe0a14cbd404824ec0_300x300.jpeg)
Synthetic products are made from chemicals or artificial substances.
A. natural B. made by machine C. man-made D. unusual
KEY A: Synthetic (nhân tạo, tổng hợp) ; natural (tự nhiên)
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