spirit your son away

[English Learner]

English Language Tests, Intermediate level

ESL/EFL Test #662 "English Slang Idioms (404)", question 7

"We're going to ......... your son away for the day. Is that OK with you? We're going to take him rafting without his mother knowing," Sonya whispered to his father.

(a) sport
(b) spirit
(c) skirt
(d) secrete

English Language Tests, Intermediate level

ESL/EFL Test #662 "English Slang Idioms (404)", answer 7

"We're going to spirit your son away for the day. Is that OK with you? We're going to take him rafting without his mother knowing," Sonya whispered to his father.

Correct answer: (b) spirit
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I put the correct answer and it is showing wrong.

[Beeesneees]

Maybe you mistakenly hit the wrong radio button. The correct answer shows correct when I try it.
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Cheers m' dears!