Put your feet up

[Guest]

Test No. express/advan-4 "How Mary fell in love", question 1

Most people like to come home after work and put their feet up.

(a) take their socks off
(b) take their shoes off
(c) relax
(d) sit down

Test No. express/advan-4 "How Mary fell in love", answer 1

Most people like to come home after work and relax.

Correct answer: (c) relax
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please give the explanation

[Torsten]

If you put your feet up, you relax.
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Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[Kuti]

there can not be any better explanation...