Question

which sentence best uses prepositions?
where is the band playing their concert at?
i dont know up with how much more i can put.
i liked the company for which i was working for.
when will you arrive at the opening gate?

Explanation:

1. Analyze the first option: "Where is the band playing their concert at?" - The preposition "at" is redundant here as "where" already implies a location, and the correct structure should be "Where is the band playing their concert?".
2. Analyze the second option: "I don't know up with how much more I can put." - The prepositional phrase "up with" is used incorrectly and the sentence structure is muddled. The correct phrase related to tolerance would be "I don't know how much more I can put up with." (preposition "with" used correctly after "put up").
3. Analyze the third option: "I liked the company for which I was working for." - The preposition "for" is repeated unnecessarily. The correct sentence is "I liked the company for which I was working." (or "I liked the company which I was working for." but the first corrected version is more formal with the relative pronoun "which" following "for").
4. Analyze the fourth option: "When will you arrive at the opening gate?" - The preposition "at" is used correctly to indicate a specific location (the opening gate) where the arrival will take place.

Answer:

D. When will you arrive at the opening gate? (assuming the options are labeled A, B, C, D with the fourth option being D)