面对突如其来的问题，他愣住了。

Miànduì tūrúqílái de wèntí, tā lèng zhùle.

Faced with the sudden problem, he was stunned.

他听到好消息时，愣在原地。

Tā tīngdào hǎo xiāoxī shí, lèng zài yuándì.

When he heard the good news, he stood there in a daze.

孩子们被老师的问题弄得愣住了。

Háizimen bèi lǎoshī de wèntí nòng dé lèng zhùle.

The children were stunned by the teacher's question.