Phrasal verb: come up

[Fairy]

Test No. errors/elem-7 "English Prepositions", question 8

Try as hard as they will but I'm afraid they'll never come on to the standard that is required by the committee.

(a) on
(b) to
(c) by

Test No. errors/elem-7 "English Prepositions", answer 8

Try as hard as they will but I'm afraid they'll never come up to the standard that is required by the committee.

Correct entry: up
The error was: (a) on

You have not found the error.
Try as hard as they will but I'm afraid they'll never come on to the standard that is required with the committee.
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In this sentence: "come up" means= " reach" /"get"?

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[Mister Micawber]

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Yes, come up to means reach an equality with, attain.
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Native English teacher at Mister Micawber's