Six-year futures for light sweet oil and natural gas

English as a Second Language English Vocabulary, Grammar and Idioms
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Six-year futures for light sweet oil and natural gas are among the most important indicators of value for oil and gas producers; such a far-sighted view, imperfect as it may be, is not widely available for the refining ....., the margin between crude oil and refined products. (*) crack (*) gap (*) spill (*) split

This is a companion discussion topic for the original entry at https://english.best/questions/8610,six-year-futures-for-light-sweet-oil-and-natural-gas-are-among-the-most-important-indicators-of-value-for-oil-and-gas-producers-such-a-far-sighted-view-imperfect-as-it-may-be-is-not-widely-available-for-the-refining-___-the-margin-between-crude-oil-and-refined-products/
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spill…

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Unfortunately you guessed wrong which is strange because you know how and where to see the correct answer.

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…crack, it is.

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When I test myself, first I answer and then I see the correct answer.
I do not try to correct my initial wrong answer. Sorry.

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