Question

when used with the days of the week, the ____________ has the special meaning “on.”
no trabajo ____ lunes... i don’t work on monday.
no trabajo ____ martes... i don’t work on tuesdays.
hay una fiesta ____ miércoles...there is a party on wednesday.
hay muchas fiestas ____viernes...there are many parties on fridays.

Explanation:

In Spanish, the preposition "el" is used before days of the week to mean "on". In the given sentences, it is the appropriate word to fill the blanks to convey the meaning of "on" with days of the week.

Answer:

el; el; el; el; el