Here is the sentence:
In Professor Curall's office, Ruben feigned the flu. He hoped to be
excused from class, get an extension on his paper, and __________.
The blank needs to begin with an infinitive. You chose spend ..., which matches be and get, keeping the structure parallel.
When you have a series of infinitives, as you do in this sentence, the to at the beginning of the series covers all of the infinitives that follow.
Nice work, grammar brain!