萨拉很伤心。

Sarah is ___sad.

他看起来很忧郁。

He looks ___sad.

他低着头，看起来很悲伤

He hangs his head, looking ___sad.

听到这个消息后，她露出了悲伤的表情。

She had a ___sad expression after hearing the news.

破旧的玩具熊孤零零地躺在角落，看起来很可怜。

The worn-out teddy bear lying alone in the corner looks ___sad.