2. 外语
  3. AI long ago mastered chess, the Chinese board game Go and even the Rubik’s Cube, ______in just 0. 38 seconds.

AI long ago mastered chess, the Chinese board game Go and even the Rubik’s Cube, ______in just 0. 38 seconds.

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问题 AI long ago mastered chess, the Chinese board game Go and even the Rubik’s Cube, ______in just 0. 38 seconds.
选项 A、which managed to solve
B、which it managed to solve
C、for which it managed to solve
D、to which it managed to solve
答案B
解析 定语从句题。定语从句的引导词which需要在从句中作主语或宾语。B选项中的it指代AI，which作solve的宾语，即the Rubik’s Cube，故本题答案为B。
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