Question

Fill in the blank with the most suitable option:
Helen works _______ a large office.

• A. on
• B. in
• C. at
• D. for

Answer 1

Answer: (B)

in

Options B and C:
'In' and 'at' are both prepositions of place. They tell us about someone/something in relation to a place. But, 'in' generally refers to large places and 'at' refers to smaller places.
In the given sentence, it is mentioned that the place 'office' is a large one, hence we use 'in' and not 'at'.
So, option B is correct and C is incorrect.
Option A: 'On' refers to place, but usually the surface or the top of a place, 'on the table'. The meaning does not apply here, hence A is incorrect.
Option D: 'For' means 'the sake of'; it refers to a purpose 'I work for her'. This word isn't relevant here, hence D is incorrect.