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SMELL A RAT

How come the front door is open? Didn't you close it before we went shopping?
I'm sure I did. I can't understand it. Frankly, I smell a rat.
Me, too. I'm convinced that something is definitely wrong here. We'd better call the police.

Go to the Dogs

Have you seen their house lately? It's really gone to the dogs
It's true that it has become run-down and in serious need of repair, but I'm sure that it can be fixed up to look like new.
I guess with a little carpentry work and some paint it could look pretty decent.

Fishy

When the security guard saw a light in the store after closing hours, it seemed to him that there was something fishy going on. He called the central office and explained to his superior that he thought something strange and suspicious was occurring.
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Pls do your homework:
Go to Yahoo

and search for:

"SMELL A RAT" dictionary
(quotation marks are important).

and you'll find dictionary pages defining the idiom.
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Hi Marius

What don't you like about Hanhood's illustration of "smell a rat"?

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Hi Hanhood

You should provide a link to the source when you quote someone else's material.
Students: We have free audio pronunciation exercises.
Comments  
hi

what's wrong i did ?

iam a new member ! and u made me to not continue
Teachers: We supply a list of EFL job vacancies
YankeeHi Marius

What don't you like about Hanhood's illustration of "smell a rat"?

Honestly, I thought he's looking for definitions. Sorry.