Questions: Cristina y Mario (they) are at the stadium. she (ella) is behind the window. The pencils (they) on top of the desk. Alan (he) from Texas.

It seems like the text provided is a mix of various elements, including a spreadsheet or table format, possibly related to a language exercise involving the Spanish verbs "ser" and "estar." These verbs are used to express "to be" in Spanish, but they are used in different contexts. Let's address the first three items in the context of choosing between "ser" and "estar":

1. Cristina y Mario (they) are at the stadium.

   • In this sentence, the verb "estar" should be used because it refers to a location. The correct sentence in Spanish would be: "Cristina y Mario están en el estadio."

2. She (ella) is behind the window.

   • Here, "estar" is also appropriate because it indicates a position or location. The correct sentence in Spanish would be: "Ella está detrás de la ventana."

3. The pencils (they) ___ on top of the desk.

   • Again, "estar" is used for location. The correct sentence in Spanish would be: "Los lápices están sobre el escritorio."

These examples illustrate the use of "estar" for locations and positions. If there are more questions or if you need further clarification on the use of "ser" and "estar," feel free to ask!