1. Hago, Hace
2.estoy, esta
3.vemos, veo
4.conozco, conoce
5.traemos, traigo
For #3 you could put La gente en el centro comercial nos entiende. (The people at the mall understand us.)
I don't know about #4 sorry.
But hopefully this helps
Answer:
Zero on the number line is the border between positive numbers and negative numbers.
YES :) it is 'Una caja de porcelana en forma de corazón'