のを知っていますか => Do you know...? N4
~のを => Nominalize verbs N5
Nominalization
...を...にする => to make something ~ N4
Purpose, target
~すればいいものを => if only (someone) would do (something), should have done (something) N1
Criticize
を…とする => is considered, is regarded as N2
Consider it
何をしますか => What are you doing... N5
Doubt
のが~です => to be N4
をはじめ/をはじめとする => For example, A N2
Lists, Examples
ふりをする => to pretend; to act as if ~ N3
~ものとする => understood as ~ N1
Consider it
さすがの...も => even ~also N2
The highest (comparative) level
ものか/ものですか => there's no way ~ N2