Select the most appropriate option to fill in the blank.

I prefer to have lunch with my family ______ Sundays.

on

The most appropriate option to fill in the blank is on.

The word on can be used to indicate a day of the week. In this case, the sentence is saying that I prefer to have lunch with my family on Sundays. This means that I usually have lunch with my family on Sundays.

The other options are not correct.

• Over means across or above. It cannot be used in this sentence because it does not describe a day of the week.
• At can be used to indicate a specific time or place. It cannot be used in this sentence because it does not describe a day of the week.
• In can be used to indicate a period of time or a container. It cannot be used in this sentence because it does not describe a day of the week.