고3 모의고사 입니다 3월

in the end, the busy typist could well produce ten times as many lines of code as the thinker, which contain twice as many new problems as the thinker’s.

여기서 계속적용법 which 의 선행사가 many lines 인가요? 아니면 앞문장 전체인가요

해석상은 앞문장 전체 같은데 그럼 관대동사가 contains 단수취급해야되는데...

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