Line (3): The first workshop is this weekend ___ the British Council... . Option B: The preposition 'on' means 'physically in contact with' or 'located on the surface of'. For example, 'the book is on the table', 'the cat is on the floor'. When placed in the line "workshop... the British Council', the meaning is quite chaotic: the workshop was conducted on the surface of the British Council. Hence B is incorrect. Option C: 'near' means 'a short distance from (something)'. When placed here, it means that the first workshop was conducted a short distance away from the British Council. But the lines "The (prize) is Diamond Membership to the British Council Library... two seats for the Spoken Skills weekend workshops. The first workshop is this weekend..." confirm that the workshop was held at the British Council and not near it. Hence C is incorrect. Option D: 'front' refers to the side or part of an object that is seen or noticed first, like 'the front page of The Hindu' or the front cover of a book. The word is a noun, whereas the required word is a preposition that connects a noun 'the British Council' to another noun 'weekend'. Also, the meaning is not quite clear: this weekend front the British Council. Hence D is also incorrect. Option A: The preposition 'at' expresses a location, being in a particular place (at the cinema, at the museum). When placed in the line "The first workshop... ___ the British Council", it refers to being in a particular place, the British Council. Hence it is the most suitable option and A is correct.