太阳消失在云层后面。

The sun ___vanished behind the clouds.

那个女孩在放学回家的路上消失了。

The girl ___vanished while on her way home from school.

我们冲出商店，但小偷已经消失得无影无踪。

We rushed out of the store, but the thief had ___vanished into thin air.