The theory which they stuck to——correct.A being proved B.prove C.proving D.proved
问题描述：
The theory which they stuck to——correct.A being proved B.prove C.proving D.proved
答
D被证明构成非谓
答
选D没错
但并不是非谓语而是系动词主动表被动.
如果是非谓语的话这句话就缺乏谓语了.
此处省略to be
全写是the theory proved to be correct