Fill in the blanks with suitable prepositions:
I sometimes listen _______ the radio or watch ________ TV.
A preposition is a word which comes before a noun or a pronoun and establishes a relationship between the elements of a clause or words. Option D)to / no preposition is correct as to indicates a connection and the second blank doesn't require a preposition. The other options are wrong as the first blank needs a preposition and of indicates possession.. These uses don't fit in the given question. The correct answer is D)to/ no preposition.