Question

They've both worked here--------
over ten years​

Answer 1

Answer:

for

Explanation:

They've both worked here for

over ten years

#SPJ2

Answer 2

They've both worked here for over ten years.

Definition of fill in the blanks:

• To put information into blank spaces to provide missing information Please fill in the blanks on the questionnaire.
• sometimes used figuratively At the end of the movie, the narrator goes back and fills in (all) the blanks.

What are fill in items?

• Fill-in-the-blank items are assessment questions in which test takers must hand enter a response, rather than select from a list of predetermined answer choices.

Is it fill in or fill in?

• The appropriate expression to use with a form is “fill in” or “fill out” (even though “in” and “out” are opposites, “fill in” and “fill out” both have the same meaning).
• So please don't ask anyone to “fill up a form” because they will not be able to do it.

Hence, They've both worked here for over ten years.

#SPJ2