Is this is a fixed phrase? Well done!

[Jael]

Test No. incompl/inter-72 "How to encourage", question 1

Well .........! This is a very good piece of work.

(a) made
(b) done
(c) finished
(d) taken

Test No. incompl/inter-72 "How to encourage", answer 1

Well done! This is a very good piece of work.

Correct answer: (b) done
_________________________

is this correct?

[Mister Micawber]

.
Yes. Well done. This is a common congratulatory exclamation, meaning that the task completed or action taken was highly satisfactory.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber