Sentence 10: '<span>Sadly, even after that water is found, only some of its clean and safe enough to drink.'
The word "its" in this sentence needs an apostrophe to become "it's". The sentence, without the contraction, would read "only some of it is clean", so when you put "it is" together, there needs to be an apostrophe. "Its" without an apostrophe becomes possessive (ex. a country needs its water), which does not make sense in the context of this question.
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