The answer is "an infinitive verb".
Acabar de + infinitive is used to express an action that has ended prior the enunciation of the sentence.
1: Is it explaining? If so in spanish explain is Explicar
2: Watch: Mirar
3: Window: Ventana
4: What are they doing??
5: Money: Dinero
6: Beach: Playa
7: Eraser: Borrador
8: I think its papers, and papers in spanish is Documentos
I think these are right, hope it helps
Hmmmmmmmmmmmmmm mlwts see