how many years will have to pass___scientists succeed in pro

来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/11/12 08:45:27

how many years will have to pass___scientists succeed in providing a cure for cancer?
a,before b.until 为什么选before而不是until.放进去都能翻译通啊?

这就是英语语言啊
人家就这么用
最主要的还是这个句子是将来式,而且before引导的从句用的是suceed
It will be five years before we meet again.
五年以后我们才能再见----来自牛津辞典
=We shall not meet again until five years from now.
可见,这里如果使用until,是不合适的

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