Fill in the blank with a suitable preposition.
She has lived in Canada for five years, so she spoke _______ a Canadian accent.
The preposition ‘with’ is used to denote the presence of something in a person, especially because of a certain condition or course of events. It is also used to denote 'using something'. In the given context the person speaks with ‘a Canadian accent’ because of staying in Canada for five years. Therefore ‘with’ is the apt answer, so option D is correct. On the other hand ‘at’ and ‘by’ are unsuitable here because ‘at’ is used to denote a place/organisation, whereas ‘by’ is used to indicate the agent of an action. ‘A Canadian accent’ is neither a place nor an agent, therefore, options A and C are incorrect. Similarly ‘for’ cannot be used in the sentence because it is used to denote why something is done or for whom. The person is not speaking because of ‘a Canadian accent’, she is using the accent. Thus option B is incorrect.