The invention ______ she spent two years will do good to the world.
问题描述:
The invention ______ she spent two years will do good to the world.
A.whichB.thatC.on whichD.when
选什么啊?讲一讲,谢谢!
答
选择on which,spend some time on something,是词组
将on 提前,与which组合,做invention的定语
也可以是这样the invention which she spent two years on will do good to the world.