Very few scientists _____ completely new answers to the world’s problems. ( 章节：5 难度：3)
- A、catch up with
- B、come up with
- C、keep up with
- D、put up with
正确答案:B
答案解析:有
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Very few scientists _____ completely new answers to the world’s problems. ( 章节：5 难度：3)
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