警方正在讯问一名男子，这与他失踪有关。

The police are questioning a man in connection with his ___disappearance.

他失踪后，许多人搜寻了多日。

Many people searched for days after his sudden ___disappearance.

这件古代文物的消失仍然是个谜。

The ___disappearance of the ancient artifact remains a mystery.