another five weeks__necessary for us to finish the work A,is B,are C,was D,will have been选择什么,为什么?

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another five weeks__necessary for us to finish the work A,is B,are C,was D,will have been选择什么,为什么?
another five weeks__necessary for us to finish the work A,is B,are C,was D,will have been
选择什么,为什么?

another five weeks__necessary for us to finish the work A,is B,are C,was D,will have been选择什么,为什么?
A.is
another five weeks是一整段时间,把它看作单数.
不明白的再问哟,请及时采纳,多谢!

很高兴为您
把another five weeks看成是一个整体 选A
希望我的回答对您有帮助,祝您学习进步,工作顺心。^_^