What's the difference between no problemo and sin problemas ?

Which sentence contains a completed action? when i was a child there was a fair in my town every year. i won a prize at the fair last year.

What groups of species are alive, eukaryotes, symmetrical, have backbones, and are tetrapods? (didn't mean to put spanish)

Mary just sent out invitations to her wedding last week the invitations were so heavy that she put more than just one stamp on each envelope she used 255 stamps and mailed out 85 invitations and see you as an equal amount of stamps on each envelope