We have a high regard for Mr Blackbecause he always tries to ________ his principles

下列句子与例句句式相同的一项是（ ）例：折节读书，欲以此驰骋当世，然终不遇。

he consequences of the chemicalleaks, the specialists haven’t given final conclusion before they obtainaccurate statistics.

The song I Believe I Can Fly tells us that believing in _______ is very important.

What’s the matter with Tim——Oh, Tim’s cell phone was left in ataxi accidentally, never ________ again.