Fill in the blank with a suitable preposition.
You have to climb _______ this hill to reach the sauna. The experience is worth it.
The prepositions ‘under’ and ‘below’ are both used to speak about something being lower than something else. The sentence speaks about a hill, and one cannot go ‘below’ or ‘under’ a hill, therefore, options C and D are incorrect. On the other hand ‘upon’ is used speak about getting on a moving object, which is not the case here. Thus option A is incorrect. The preposition ‘up’ is used to denote the movement from a lower point to a higher point. This is an apt answer because when a person climbs the hill the movement is from a lower point to a higher level. Thus option B is correct.