Expression "he eats like a horse"

[Germman]

English Idioms and Expressions, Advanced Level

ESL/EFL Test #48 "Food Idioms", question 8

Lilly is so skinny but she eats like a horse.

(a) has a large appetite
(b) has no manners when she eats
(c) eats horse meat

English Idioms and Expressions, Advanced Level

ESL/EFL Test #48 "Food Idioms", answer 8

Lilly is so skinny but she has a large appetite.

Correct answer: (a) has a large appetite
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WHAT DOES MEAN THE EXPRESSION EATS LIKE A HORSE THANKS.

GERMAN

[Mister Micawber]

.
Eats a lot.
.
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Native English teacher at Mister Micawber's