嫌疑人被监视着，但他在警方逮捕他之前就神秘消失了。

The suspect was under surveillance, but he ___vanished ___into ___thin ___air before the police could arrest him.

当我们去度假时，我们的担忧并不会神秘消失；它们常常在我们的脑海中挥之不去。

Our worries don't ___vanish ___into ___thin ___air when we go on holiday; they often linger in our thoughts.

魔术师在表演中让兔子神秘消失了。

The magician made the rabbit ___vanish ___into ___thin ___air during his performance.