Question

What made him glad was that the theory he had stuck to______ wrong. A. turned out B. turning out

What made him glad was that the theory he had stuck to______ wrong. A. turned out B. turning out C. was turned out D. to be turned out

Answer 1

选A. turned out
要注意断句：What made him glad was that / the theory he had stuck to / turned out wrong.
中间的he had stuck to是定语从句，限定中心词the theory。
句子意思是“令他高兴的是他（之前）所坚持的理论结果是错的”。

Answer 2

选A 这样断句
(What made him glad) was that (the theory) (he had stuck to)____turned out__ wrong,
(he had stuck to)为修饰成分，填空的地方应该选填一个动词，所以BD肯定不对，然后根据句子的意思和习惯用法，选择答案A。
sth turn out (to be) xxx 什么变成怎样

Answer 3

B

Answer 4

D