Plz help ASAP with real answers

Originally, uruguay was home to small groups of indigenous tribes. during european colonization, nearly all the indigenous population was conquered, killed, or driven out. in what year did the spanish explorers first land in the area? 1492 1945 1600 1516

No debemos el medio ambiente. a. contaminar b. preservar c. desechar d. cumplir

Which verb form correctly completes this sentence? nosotros que la pintura es de muy buen gusto. a. pienso b. piensan c. pensáis d. pensamos