Fill in the blank with a suitable preposition.
Reaching school _______ 8:00 am on a Monday is really tiring.
The given sentence needs to be filled with a preposition of time since it refers to a timing. Therefore preposition ‘beside’ is inappropriate since it is a preposition of place that denotes an object being placed near another object or the presence of something alongside something else. Hence option D is incorrect. On the other hand, ‘on’ is used to speak about a day or date which is unsuitable here. Thus option C is incorrect. ‘During’ is used to indicate a period of time, which is once again irrelevant here. So option A is incorrect. The preposition ‘by’ is used to denote a time limit. It is used when we speak about a time within which something needs to be done. In the given sentence the person needs to reach the school before it is 8 am, therefore ‘by’ is the apt answer and option B is the correct.