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

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
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

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 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