她在结冰的人行道上滑了一跤。

She ___slipped on the icy sidewalk.

她悄悄溜出了房间，没人注意到。

She ___slipped out of the room without anyone noticing.

他的名字不知不觉地从名单中被漏掉了。

His name ___slipped off the list without anyone noticing.

自从换了新经理后，公司的业绩开始下滑。

The company's performance has ___slipped since the new manager took over.