He didn‘t seem to mind_____the music while he was studying.
C
“mind+动名词”表示介意某事。表示介意某人做某事用“mindone/one‘sdoingsth.”。另外，listen是不及物动词，后面必须跟介词to.
_____hespeakssoftlyisnoproofthatheiskind.
Thegirlwhofoundtheringreceivedagenerous_____offivepounds.
Thedriverpulled_____atthetrafficlights.
Hisarticleisbetterthan_____intheclass.
Itwasnotuntilshehadfinishedallherwork_____.