Question

Please wait with me ------ the bus arrives

Answer 1

please wait with me until the bus arrives

Answer 2

Please wait with me until/ till the bus arrives.- This is the answer.

About conjunctions and their usage:

• Conjunctions are linking words. That is they are words that help to join  two clauses/ phrases/ words.
• Some of the conjunctions are: because, even though, so that, so-that, yet, but, still, etc.,
• Here we have given two individual clauses which have to be joined using a conjunction.
• The first sentence is a plain statement. But the second statement/ clause requires a time frame .
• 'Till/until' is a conjunction which is used to indicate a time frame before something happens. Both 'till' and 'until' mean the same.
• Therefore the answer is: Please wait with me until/ till the bus arrives.