The correct preposition is "at" when referring to a specific location like headquarters. For example, "I am at the HQ."
The preposition "to" typically goes with "according". For example, "According to the latest research, exercise has many health benefits."
The correct preposition is "past" when referring to something that has already occurred or a physical location farther along a route. "Pass" is a verb meaning to move by someone or something.
The correct sentence with the correct preposition should read: "We climbed the hill slowly."
On
i am at the bank
on
after a preposition
To
not
opposite of opposite to opposite from
I prefer coffee to tea. 'to' is the correct preposition.