我的护照不见了，我找遍了整个包。

My passport is ___missing; I've looked all through my bag.

我的作业本不见了，你能帮我找找吗？

My homework book is ___missing; can you help me look for it?

我的猫不见了，我很担心它。

My cat is ___missing, and I'm very worried about her.