'To keep company' - slang expression or an expression of the spoken english?

[Limbo]

English Language Tests, Intermediate level

ESL/EFL Test #517 "English Slang Idioms (259)", question 2

"Will you come to the store with me to keep me .........?" Linda asked Chris.

(a) company
(b) union
(c) social
(d) together

English Language Tests, Intermediate level

ESL/EFL Test #517 "English Slang Idioms (259)", answer 2

"Will you come to the store with me to keep me company?" Linda asked Chris.

Correct answer: (a) company

Your answer was: correct
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to keep company: is it a slang expression or an expression of the spoken english? Which other one could be a more literary form?
bye and thank you in advance for answering
Limbo

[Ralf]

Hi Limbo,

'Will you keep me company?' is the formal way of asking 'Care to join me?'

Cheers

Ralf
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