The correct articles here are "the" for both blanks. The phrase "world champion" is specific and refers to a definite person, so "the" is required before it. Additionally, "the third year" refers to a specific, known event or time period, so "the" is also appropriate.
Thus, the correct phrase is: "She is the world champion for the third year in succession."
Each question has a sentence that has an underlined part. Choose the option which rephrases the underlined part in the most appropriate manner in terms of grammar and usage.
In an attempt to boost their profits, many edible oil-producing companies have been engaging themselves in propaganda against commonly used oils and promoting exotic and expensive varieties of oils \(\underline{as\ more\ healthier\ options.} \)