他在阳台上弹奏夏威夷小吉他，声音很欢快。

He played a happy melody on his ___ukulele on the balcony.

夏威夷音乐会上，乌克丽丽的欢快声音让观众们情不自禁地跟着节奏摇摆。

The cheerful sound of ___ukuleles at the Hawaiian concert made the audience sway to the rhythm.