a goody two-shoes

[Oinas]

English Language Tests, Intermediate level

ESL/EFL Test #363 "English Slang Idioms (84)", question 3

"I invited Sarah to the party on Saturday but she said that she wouldn't go because her parents don't approve of her drinking. What a ......... two-shoes," Willis said to Max.

(a) dumb
(b) scary
(c) naive
(d) goody

English Language Tests, Intermediate level

ESL/EFL Test #363 "English Slang Idioms (84)", answer 3

"I invited Sarah to the party on Saturday but she said that she wouldn't go because her parents don't approve of her drinking. What a goody two-shoes," Willis said to Max.

Correct answer: (d) goody

Your answer was: correct
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Hi! What is the meaning of "goody two-shoes"?
Thank you in advance!

[Beeesneees]

http://www.oxfordadvancedlearnersdictionary.com/dictionary/goody+two+shoes
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Cheers m' dears!