他的手指灵活地拨动琴弦。

His fingers ___strum the strings skillfully.

他懒洋洋地拨弄着尤克里里的琴弦，毫无节奏感。

He lazily ___strummed the strings of his ukulele without any rhythm.

她轻轻地拨弄着吉他琴弦，发出柔和的音乐声。

She gently ___strummed the guitar strings, producing soft musical notes.