Ask.
Generally if the feat description says "weapon", it won't work for a monk using fists. Say no to Ambidexterity and Two-Weapon Fighting.
Good feats for a monk (if it has sufficient stats) are Power Attack, Cleave, Dodge, Expertise, Improved Critical, and the saving throw feats.
Optional feats are Dirty Fighting and Rapid Shot.
Skip Improved Initiative, the feat is broken and doesn't work. Also skip Deflect Arrows, as you'll get that feat for free, and Dash, since monks already get a level-based movement bonus.