Does one use quotation marks or underline for a well-known musical play?

[Migrelli]

English Idioms and Expressions, Advanced Level

ESL/EFL Test #22 "Egg expressions", question 3

You've always stood by him in all his bad habits but underneath I think he's a bad egg.

(a) smelly person
(b) worthless person
(c) difficult person
(d) stupid person

English Idioms and Expressions, Advanced Level

ESL/EFL Test #22 "Egg expressions", answer 3

You've always stood by him in all his bad habits but underneath I think he's a worthless person.

Correct answer: (b) worthless person
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Does one use quotation marks or underline for a well-known musical play?

Migrelli

[Mister Micawber]

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Use italics for play and movie titles. If those are unavailable, use underscoring.
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Native English teacher at Mister Micawber's