In an attempt to diversify their supplier, they have repeatedly contacted companies ____ products and services meet their needs.
whose 가 답인데
보기 중에 있는 of which는 왜 안되는 걸까요?
In an attempt to diversify their supplier, they have repeatedly contacted companies ____ products and services meet their needs.
whose 가 답인데
보기 중에 있는 of which는 왜 안되는 걸까요?


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