Fill in the blanks with the most appropriate words.
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 E)on/ besides is correct as on and besides indicate a subject matter and manner respectively. The other options are wrong as about, during, beyond, and down indicate a piece of information, a general time period, further away, and a movement towards a lower position respectively. These uses don't fit in the given question. The correct answer is E)on/ besides.