is "quick on the uptake" a phrase?

[Dora]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #48 "Speed", question 2

As a child he had no problems learning foreign languages mainly because he was very quick on the ..........

(a) downturn
(b) upstart
(c) downfall
(d) uptake

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #48 "Speed", answer 2

As a child he had no problems learning foreign languages mainly because he was very quick on the uptake.

Correct answer: (d) uptake

Your answer was: correct
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is "quick on the uptake" a phrase? thanks!

Dora

[Lost_Soul]

Yes, it is an idiom which means quick to understand or learn. You have to cram it into your head