With which subjects does not change the form of the verb in spanish

Activity write eduardo's blog (in spanish) providing some information to tourists about some of the laws in ecuador that they should be aware of before visiting the country. make sure you use verbs of necessity in your sentences. you can also do your own online research to write your response.

Correct answer only ! ¿quién cerró la puerta que (estar) abierta?

Usamos  en la clase de matemáticas.un gimnasioun auditoriouna bandauna calculadora