Complete each sentence by filling in the correct form of the verb given in parentheses:
1. Es necesario (levantar) las pesas para fortalecer los músculos?
2. No creo que los estudiantes (estar) contentos.
3. Hay dos actores que no (pronunciar) bien las palabras.
4. No creo que Agustín (tener) la resistencia para ser parte del equipo de carrera a campo traviesa.

In the Spanish language, sentences can refer to the present, future, or past. Moreover, sentences can refer to hypothetical or conditional situations, which is the case of the subjunctive form used in the sentence.

How to conjugate the verbs?

In Spanish, verbs have a different form depending on the subject. Here is one example of a verb in the subjunctive form:

Verb: Jugar
Yo juegue
Tu juegues
El/ella juegue
Nosotros juguemos
Ellos juguemos

Based on this the answers are:

levantar = levantar (the verb does not change because the sentence refers to the general action)
estar = esten (Conjugation for they)..
pronunciar = pronuncian (Conjungation for they).
tener = tenga (Conjugation for he).

Learn more about subjunctive in: https://brainly.com/question/7538412