Idiom for performing in live theatre is "on stage"

[Eliot]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #58 "Stages", question 5

I've seen her act in many films but never live ......... stage.

(a) at
(b) in
(c) through
(d) on

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #58 "Stages", answer 5

I've seen her act in many films but never live on stage.

Correct answer: (d) on

Your answer was: incorrect
I've seen her act in many films but never live at stage.
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Why on not at?
Let me know please.......

Eliot

[Mister Micawber]

.
The idiom for performing in live theatre is 'on stage'.
.
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Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mister Micawber

[Alan]

Hi Eliot,

As has been explained on stage is the way of describing where actors perform live in the theatre. Possibly you were thinking of another use of stage,which has the meaning of point/section/period. We use it as in: At this stage in your life you should be looking for a permanent job.

Alan
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English as a Second Language
You can read my ESL story A day in the life of a flat hunter