Complete the story about Sarah's busy weekend trip to town.

Sarah went to the bakery to buy a huge chocolate cake.
She went to the local library to read a book about time travel.
Finally, she went to the animal shelter to pet every single dog.

Sarah went to the bakery to buy a huge chocolate cake.
She went to the local library to read a book about time travel.
Finally, she went to the animal shelter to pet every single dog.

We use the infinitive (to + verb) to express purpose. It is a shorter, more natural way of saying "in order to."