Hi, I was reading a post about preposition before which and the writer said: Putting the preposition before which is quite formal style. In spoken English the preposition is usually at the end of the relative clause: This is the kind of music [which/that] he is interested in. Let's discuss the accident [which/that] they are responsible for So, where the preposition can go if it is put at the end of the relative clause: 1.
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