I believe that the answer is nos caimos
To look at the gimnasio (gym)
The other answers are about talking to someone. In this case what is his idea for (finding) William.
Answer: to look at the gimnasio
Hope it helped
Answer:
From Democracy's Borderlands: Hispanic Congressional Representation in the Era of U.S. Continental Expansion, 1822–1898
The answer would be "escuchar"
I like to listen to the radio.
Hope this helped!