英语 求详细解析Research___all over the world into the possible cause of cancer in the past years.A.was made B. had been made C.has been making D.has been made可以理解为什么用完成时态,但是,怎么理解这句话?into做为什
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英语求详细解析Research___allovertheworldintothepossiblecauseofcancerinthepastyears.A.wasmadeB.hadbeenmadeC.
英语 求详细解析Research___all over the world into the possible cause of cancer in the past years.A.was made B. had been made C.has been making D.has been made可以理解为什么用完成时态,但是,怎么理解这句话?into做为什
英语 求详细解析
Research___all over the world into the possible cause of cancer in the past years.
A.was made B. had been made C.has been making D.has been made
可以理解为什么用完成时态,但是,怎么理解这句话?into做为什么的连接介词啊?
英语 求详细解析Research___all over the world into the possible cause of cancer in the past years.A.was made B. had been made C.has been making D.has been made可以理解为什么用完成时态,但是,怎么理解这句话?into做为什
大概可以理解为,过去的几年里有做一些关于癌症的可能病因的研究.吧
research into 什么（这里是癌症的起因）
什么意思啊，research做主语，用被动，在某个方面做过研究，into后面是研究的内容