31 John sits ........ Pete in class. They are good friends.

Step 1: Analyze the sentence structure and context. The sentence describes John's position relative to Pete in class.
Step 2: Evaluate the options 'on' and 'next to'. 'On' is typically used for surfaces, while 'next to' indicates proximity.
Step 3: Determine the most appropriate preposition for sitting next to someone in a classroom setting. 'Next to' fits this context best.