2. 考研
  3. ______fairly recently that this problem was solved, at least partially.

______fairly recently that this problem was solved, at least partially.

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问题 ______fairly recently that this problem was solved, at least partially.
选项 A、Until
B、Not until
C、It was until
D、It was not until
答案D
解析 本题是测试强调句，将含有not…until的一般陈述句变为强调时间状语的强调句时，需将否定词not与until一起提到强调结构中去。
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考研英语一

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