what is soar?

[Milla]

Business Idiom in English, Intermediate level

ESL/EFL Test #168 "Poverty in the US: living standards expressions", question 7

During the 1990's, salaries for highly skilled employees ........., while wages for those who are less skilled remained about the same.

(a) soared
(b) flew
(c) took off
(d) took to the air

Business Idiom in English, Intermediate level

ESL/EFL Test #168 "Poverty in the US: living standards expressions", answer 7

During the 1990's, salaries for highly skilled employees soared, while wages for those who are less skilled remained about the same.

Correct answer: (a) soared
_________________________

what is soar?

Milla

[Mister Micawber]

.
Please try your dictionary first.
.
_________________
Native English teacher at Mister Micawber's

[Hieupt]

What does "take to the air" mean by the way?
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Thank you very much,
Hieu Phan.

P/s: Please just correct if I'm wrong somewhere!