With tests that are evaluated by an impartial tool, “done” is really “what everyone agreed on”, not “almost done with just a few things to fill in tomorrow”.

We have two vacancies to be filled.

Some of them, mainly women, now show up in my classes as "older students, " often returning to take up the education they dropped out of twenty-some years ago.

She served a function (lover, friend), and now that she is gone, that function must be filled by another.

It's very difficult to pick up dropped stitches in this pattern.