The word “inform”, in bold in the text, is a verb in the __________....

Questão de Inglês da banca Aeronáutica aplicada no concurso EEAR (2019). Confira a resolução completa abaixo:

1              The pilot of a Beech Baron airplane noticed that one of
         his engines was on fire. He contacted the nearest air traffic
         control center to ask for help.
                The  voice  __________ the  radio  answered,  “This  is the
5       Control    Tower.   “Please   inform   your   altitude”.
                The pilot replied, “We are at 30,000 feet”.
The word “inform”, in bold in the text, is a verb in the __________.