A base sth on sth 把.建立在.的基础上
把他的新理论建立在一系列科学实验的基础上为什么不选C介词常提前，这是习惯用法，肯定对的
the scientists needed to do a series of scientific experiments____his new theory.
the scientists needed to do a series of scientific experiments____his new theory.
A.on which to base B,to base on which C which to base on D which to be based on
A.on which to base B,to base on which C which to base on D which to be based on
英语人气：485 ℃时间：2020-05-03 13:28:54
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