(X) There are to many things I dont know on it. (X) There are to many things on it I dont know . Neither is acceptable.
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Prple! But want to refer to a document. Can't I still use "on it" then?Yes, instead of 'about'. It would be good if you included all information at the beginning of your posting. My service is free but my time is valuable.
My service is free but my time is valuable.