Stone is all around us.Stone is usually very hard,46 it can also be soft.Stones have many us

Stone is all around us.Stone is usually very hard,46 it can also be soft.Stones have many us

题目
Stone is all around us.Stone is usually very hard,46 it can also be soft.Stones have many us
答案
Stone is all around us. Stone is usually very hard, ( but )it can also be soft. Stones have many uses.
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