Ecce Romani Ch.2 grammar

Subjects and verbs are basic elements of sentences.
The subject in the sentence is the person or thing that is or does something.
The verb est is used as a linking verb when it links the subject with a noun or an adjective. This noun or adjective completes the pattern of the sentence and is called a complement.

Examples:
Cornelia est puella. Flavia est defessa.

If the subject is singular, the verb ends in -t.
If the subject is plural, the verb ends in -nt.

Choose the correct completion of the sentence.