Our music teacher often enjoyed _____ playing the violin in

Our music teacher often enjoyed _____ playing the violin in his spare time.
A.him by B.himself by C.him in D.himself with答案选择B.
为什么后面用by而不能用with?

D
enjoy himself with 和enjoy himself by 都是他自己享受的意思
with 的用法：
prep.用；支持；随着；和…在一起
by的用法：
prep.被；经由；在……之前；在附近；依据；通过
adv.经过；通过；附近；[域]白俄罗斯