Originally Posted by
abmj-jr
In all of your examples, 'wa' is designating the subject of the sentences - Suzuki-san, Tokyo and watashi. In two of them, 'ga' is referring to the object - nani and hito.
I'd be curious to hear how you break these sentences down as a teacher, though I am partly at fault for not translating them literally enough. The first sentence literally means something like "What is good for Suzuki-san?" and the last sentence is really saying "for me, [it] will be beer" (with the pronoun subject omitted because Japanese lets you do that) -- so Suzuki-san, Tokyo and watashi are all prepositional objects. (any grammar nerds willing to correct me here?)