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Fri, 03/19/2021 - 00:59	Mithun Chandra Banik	80	Check this topic

Topic title: Natural pearls grow in wild oysters The process starts when an irritant such as a grain of sand or a piece of shell gets inside an oyster s shell To protect its delicate body from the irritant the pearl secretes a substance called nacre to surround the ir

Topic category: Integrated TOEFL Writing