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1. corren (ellos form)
2. abre (Ud. form)
on the first one is the second option because it says <u>estaba</u>.
on the second one is the first one because is saying <u>comimos</u>.
on the third one is the second one because it says <u>quiso</u>.
on the forth one is the second because it says <u>iba</u>.
Graciosa because it ends in an a which refers to a female