Choose the most suitable option to fill in the blank.

Don’t worry, Mr. Mason. I’ll make sure the work is completed ______ 8:30 a.m.

Correct option is C

Explanation:

The correct option is "by". In this context, "by" is used to indicate a deadline or the latest time by which the work will be completed. The sentence suggests that the work will be finished no later than 8:30 a.m.

"By" is commonly used to refer to time or a specific deadline, expressing that something will be done at or before the specified time. It is the most suitable word here to show the time frame for completing the work.

Information Booster:

By is used to specify the latest time that an action will be completed. It is a preposition often used in sentences referring to deadlines, such as "I will finish the project by Friday."

This usage of by emphasizes that the work will be completed at or before 8:30 a.m., making it the most appropriate choice in this sentence.

"By" can also be used for other types of time references, such as dates, times, or events that indicate completion, e.g., "The report will be ready by noon" or "The meeting will end by 5 p.m."

"By" is used here to specify a time deadline, meaning the work will be completed no later than 8:30 a.m.

Additional Knowledge:

Inside: This word refers to being within an enclosed space and is not used to indicate time or a deadline. 

With: "With" is typically used to indicate association or accompaniment, but it is not used to refer to a deadline or time by which something will be completed.

Beneath: "Beneath" is used to refer to something located below or under something else, and it is not appropriate for indicating a time or deadline.