Final answer:
The correct verb form to complete the sentence is 'conozca'.
Step-by-step explanation:
The correct verb form to complete the sentence is conozca.
In this sentence, the subject is 'ella' (she) and the verb form should agree with the third person singular. The verb 'conocer' means 'to know' and in the present subjunctive form, 'conozca' is the correct ending for the verb.
Example: Es una pena que ella no conozca las normas sociales del país. (It is a shame that she doesn't know the social norms of the country.)
Learn more about Verb forms in Spanish