In order for one to be prepared for the GATs, you must practice every skill on the test until one is confident in the material.
The error in the sentence is in the consistency of pronouns. The sentence begins with "one" and therefore "one" must be used as the pronoun through the remainder of the sentence.
940 MCQ for effective preparation of the test of Nouns and Pronouns of English Grammar section.
Read the MCQ statement: In order for one to be prepared for the GATs, you must practice every skill on the test until one is confident in the material. , keenly and apply the method you have learn through the video lessons for Nouns and Pronouns to give the answer. Record your answer and check its correct answer and video explanation for MCQ No. 360-4639.