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- 单项选择题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
- B
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A、catch up with
B、come up with
C、keep up with
D、put up with
关注下方微信公众号，在线模考后查看