Fill in the blank with a suitable preposition.
The dog's leash was held _______ her. [Basic]
The preposition ‘by’ is used to refer to the person who performs an action. In the given sentence, the person ('her') holds the ‘leash’ therefore she is the agent of the action. Hence option D is correct. On the other hand, ‘with’ is used to refer to the tool or object that is used to perform an action. Since the blank is followed by a person and not an object/tool ‘with’ is unsuitable. Therefore option A is incorrect. Similarly ‘of’ and ‘as’ cannot be used in the given context, because both the prepositions are not used after the past form of 'hold' which is ‘held’. In addition to this ‘of’ is used to refer to belonging while ‘as’ is used to compare two things. The person doesn’t belong to ‘the leash’ and we cannot compare the person with the leash. Hence options B and C are incorrect.