Meaning of "Full well"

[angelinka]

Test No. incompl/elem-17 "White Water Rafting", question 9

That's not fair. You know full ......... what it feels like to be worried sick when everyone else is laughing at you.

(a) good
(b) well
(c) fine

Test No. incompl/elem-17 "White Water Rafting", answer 9

That's not fair. You know full well what it feels like to be worried sick when everyone else is laughing at you.

Correct answer: (b) well

Your answer was: incorrect
That's not fair. You know full good what it feels like to be worried sick when everyone else is laughing at you.
_________________________

What does "full well" mean?

angelina

[Alan]

Hi,

It means quite clearly.

Alan
_________________
English as a Second Language
You can read my ESL story Colour Idioms

[Guest]

[Torsten]

I can see your point but full well is an idiom that can't be changed.
_________________
Test Of English for International Communication
TOEIC Preparation & TOEIC Vocabulary

[Ceo Neeraj]

Thank you all for clarifying this one out.
I was out of answer in this one.