Why is "suits" not "fits"?

[lou]

Synonym Search, Intermediate level

ESL/EFL Test #105 "Synonyms for adapt", question 7

This plan of yours really ......... me!

(a) suits
(b) matches
(c) fits
(d) suffices

Synonym Search, Intermediate level

ESL/EFL Test #105 "Synonyms for adapt", answer 7

This plan of yours really suits me!

Correct answer: (a) suits

Your answer was: incorrect
This plan of yours really fits me!
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why suits not fits?

lou

[Alan]

Fit is often to do with size as in: These shoes fit me perfectly. Suit is often used with the idea of being right or appropriate as in: What you have suggested suits me perfectly.

A
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English as a Second Language
You can read my ESL story Guy Fawkes Night for You