Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

Where are America's rather what are are the 3 post popular libraries for undergraduates in the Harvard system?
What are the 3 post popular libraries for undergraduates in the Harvard system?

Who or no rather what exposes organisms to infection?
What exposes organisms to infection?

A conservative no the liberal force that acts on a closed system has what kind of mechanical work?
A liberal force that acts on a closed system has what kind of mechanical work?