Overhead levelled off?

[Zhangbaixiang]

Business English Lesson, Advanced Level

ESL/EFL Test #140 "Annual Report", question 7

Overhead levelled off when utility charges were ......... by the government.

(a) cancelled
(b) frozen
(c) given
(d) tapped

Business English Lesson, Advanced Level

ESL/EFL Test #140 "Annual Report", answer 7

Overhead levelled off when utility charges were frozen by the government.

Correct answer: (b) frozen
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I don't under stand the meaning of the sentence. Can you explain to me.
thanks.
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I have a dream and I want to know the secret of time and universe.

[Torsten]

It means that the overhead costs became stable when the government forced utility providers to keep their prices at the same level. Please let me know which words or phrases you don't know. If you say you don't understand the entire sentence it's difficult for us to explain it to you.

TOEFL listening lectures: What is the professor's opinion of Ragwort?

[Zhangbaixiang]

Thanks a lot, Dear Torsten. Now I got it.
In fact I am an accountant, but I still find some words or phrases seem like some argots and difficult for me to understand.
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I have a dream and I want to know the secret of time and universe.