請問高手devote oneself to do 與devote oneself doing 用法上有何區別

題目：

請問高手devote oneself to do 與devote oneself doing 用法上有何區別
he devoted himself to----(study,studying) the law.該如何選?

解答：

devote oneself to (doing) sth.
致力於,獻身於
句型：devote one’s time/life/energy to (doing) sth
應該選studying