muaxuan68 Posted January 17, 2003 Share Posted January 17, 2003 Hi all, let's discussion this sentence. The most abundant phosphate mineral, apatite, includes several types that vary in their content of fluorine, chlorine, or hydroxyl ions. The question is why "content" is not in the plural form. what are the general rules? Quote Link to comment Share on other sites More sharing options...
Erin Posted January 17, 2003 Share Posted January 17, 2003 There is no simple answer to this question. This is the kind of thing that graduate students of linguistics study. But I don't think that TOEFL will underline this part of the sentence. Quote Link to comment Share on other sites More sharing options...
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