'walked a lot' vs 'worked a lot'

[Lida]

English Language Tests, Intermediate level

ESL/EFL Test #273 "When do you say this?", question 6

I say "My feet are killing me" when I have ..........

(a) walked a lot
(b) worked a lot
(c) eaten a lot

English Language Tests, Intermediate level

ESL/EFL Test #273 "When do you say this?", answer 6

I say "My feet are killing me" when I have walked a lot.

Correct answer: (a) walked a lot

Your answer was: incorrect
I say "My feet are killing me" when I have worked a lot.
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what is correct answer?

Lida

[Mister Micawber]

.
'Walked a lot'. It is shown right above your question.
.
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Native English teacher at Mister Micawber's