We worked far into the night, but no one______a satisfactory solution.

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问题 We worked far into the night, but no one______a satisfactory solution.

选项 A、came up with
B、kept up with
C、caught up with
D、checked up with

答案A

解析 Come up with意为“想出来”;keep up with意为“赶得上,与……保持联系”;catchup with意为“处罚,追捕,赶上,追上”;check up with意为“与……相符合”。句意:我们工作到了深夜,但是没有人想出满意的解决办法。
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