Here is the sentence:
In Mrs. 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!