她僵硬地坐在椅子上，一动也不动。

She sat ___stiffly in the chair without moving.

他在面试时僵硬地握了握手，显得很紧张。

He shook hands ___stiffly during the interview, looking very nervous.

这位老人僵硬地从椅子上站起来。

The old man stood up ___stiffly from the chair.