Fill in the blanks with the most appropriate option:The children didn't _______ to school because it ________ Sunday.

The sentence describes a past action, so the correct verb forms are needed to convey this.

"Go" is the base form of the verb used after "didn't," which requires the base form without any additional tense markers.

"Was" is the correct past tense of the verb "to be" for the singular subject "it" (referring to Sunday).

Therefore, "The children didn't go to school because it was Sunday" is the correct and grammatically appropriate choice.