Respuesta :
Option correct is D
I do not know when the flagpole was painted.
In this case, the pronoun <<when>> introduce a noun clause and its function is to be an adverb.
- ¿How can we distinguish when a relative is a relative pronoun or a relative adverb?
A relative adverb introduces a clause, which has as an antecedent a noun. Relative adverbs are usually used insted of a relative pronoun plus a preposition.
There are three main relative adverbs:
- where
- when
- why.
Answer:
I do not know when the flagpole was painted
Explanation: