Fill in the blanks with the most appropriate words. The students________very tired today. Because they_______at a party last night.

The correct answer is: The students were very tired today. Because they were at a party last night.

The verb “to be” is used in the past tense to describe something that happened or was true in the past. In this case, the students were tired today because they were at a party last night.

The verb “to be” can also be used in the present tense to describe something that is true now. However, in this case, the students are not still tired today. They were tired yesterday, but they are not tired today.

Therefore, the correct answer is “were” and “were.”