La tienda would be the correct answer.
1.Bailamos
2.Estudian
3.camino
4.compra
5.cantan
6.hablas
7.pagamos
8.necesita
9.usan
Answer: C) Tenemos
The verb tener (to have) needs to be conjugated in the 'we' form, because the speaker is talking about him/herself plus others.
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