The technicians and workers have come______new methods to increase production.

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问题 The technicians and workers have come______new methods to increase production.

选项 A、on with
B、out with
C、upon
D、up with

答案D

解析 come on with不是固定搭配；come out with"说出来，生产，发表"；come upon"碰到，(偶然)发现"；come up with"赶上，想出，提出"。

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