Quickly is a adverb that modifies another adverb in the sentences
The bolded pronoun in the given sentence is the word "which". This pronoun is an example of an interrogative pronoun. Interrogative pronouns are pronouns that are used to introduce a question. The antecedents of interrogative pronouns are unknown because it is what is being asked in the sentence that is missing.
1 the man talking on his phone missed his bus
2) the tv show we watched last night wasn’t very good
3) the actor appearing in the play is from france
4) i love the photos taken from the book
Answer:
4. we timed ourselves during the experiment