Complete as sentenças usando in, at ou on. Has she got a job? No, she´s still __...

Questão de Inglês da banca IESES aplicada no concurso Gas Brasiliano SP (2017). Confira a resolução completa abaixo:

Complete as sentenças usando in, at ou on.

Has she got a job? No, she´s still ____ School. We walked to the restaurant, but we went home __ a taxi. I enjoyed the flight, but the food ______ the plane wasn?t very nice.

Assinale a sequência correta: