Quiet as a mouse

[Richard]

Test No. incompl/inter-42 "Keeping it Quiet", question 1

As it was very late when he came home he was as quiet as a ......... in order not to wake anybody up.

(a) cat
(b) mouse
(c) dog
(d) rat

Test No. incompl/inter-42 "Keeping it Quiet", answer 1

As it was very late when he came home he was as quiet as a mouse in order not to wake anybody up.

Correct answer: (b) mouse

Your answer was: incorrect
As it was very late when he came home he was as quiet as a rat in order not to wake anybody up.
_________________________

Hi!
Why the answer RAT is incorrect?

[Alan]

Hi,

This is the comparison that is used and cannot be explained gramatically.

Alan
_________________
English as a Second Language
You can read my ESL story Present Simple

[Admira]

I thought the right answer is rat because they are very quite animals. Admira
_________________
To be or not to be ,that is the question.