This is the very way (that/in which/-) he did the experiment.【C】
way后面是定语从句修饰way,定语从句成分完整时,定语从句修饰way,则引导词可以是that,in which或不用引导词.
This is the very way (that/ -) he told me yesterday.【C】
定语从句缺少told的一个宾语,应该使用引导词which,that,还可以省略,但是这个句子中,先行词由the very来修饰,则不能用which.
This is( how) he did the experiment.【A】
这是how引导的名词性从句,作is的表语从句.