This is how you can complete the sentence given using Spanish vocabulary:
Él levanta la mano cuando tiene una pregunta.
This is a Spanish vocabulary activity, you have to complete the sentence with words that fit the context given.
The translation to the sentence is "He raises his hand when he has a question", so the words used are "hand" (mano) and "question" (pregunta).
Check more information about Spanish vocabulary here brainly.com/question/25817689