这只金丝雀唱得很欢快。

This ___canary is singing happily.

我奶奶养了一只金丝雀，它的歌声非常悦耳。

My grandmother keeps a ___canary whose singing is delightful.

她买了一辆金丝雀黄的自行车，非常显眼。

She bought a ___canary yellow bicycle that was very eye-catching.

那名新员工成了公司财务欺诈的预警信号，就像矿井中的金丝雀。

The new employee became the ___canary in the coal mine for the company's financial fraud.