Idiom: walking on air?

[Mammy]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #409 "Air Idioms", question 8

As soon as they heard the news, they were walking on air -- means: ..........

(a) were very shocked
(b) were very angry
(c) were very happy
(d) were very polite

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #409 "Air Idioms", answer 8

As soon as they heard the news, they were walking on air -- means: were very happy.

Correct answer: (c) were very happy
_________________________

is my answer correct?

Mammy

[Alan]

Hi,

Read what is on the screen.

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