他在社交媒体上总是嘲笑别人的观点。

He always ___mocks people's opinions on social media.

他经常在社交媒体上辱骂陌生人。

He constantly ___insults strangers on social media.

矿工们在处理炼钢过程中产生的废渣。

The miners were handling the ___slags produced during the steel-making process.