Se cayó por eso pensamos afortunadamente que no era grave, pero el niño lloraba.
The Spanish sentence is about a boy who fell suddenly.
Conclusively, The right adjective to fix into the sentence is afortunadamente which is fortunately and thus it changes the sentence to "He fell so we thought fortunately it was not serious, but the child was crying".
Learn more about Spanish adjectives from
https://brainly.com/question/2457914
