______ in the library.[they/be/not]

fill in the blanks with the correct form of be. can some1 help me

They are not in the library.

To fill in the blanks with the correct form of "be", you need to determine the subject of the sentence and the appropriate form of "be" for the given tense and negation. In this case, the subject is "they" and the sentence is in the present tense with the negative form.

To form the negative form of "be" in the present tense, you use the word "not" after the appropriate form of "be." In this case, the appropriate form for "they" is "are." Therefore, the correct answer is:

"They are not in the library."