Final answer:
The correct preposition to fill in the blank is 'du' which means 'from' in the given sentence.
Step-by-step explanation:
The correct preposition meaning 'from' to fill in the blank in the sentence 'L'avion vient juste d'arriver ______ Sénégal' is du.
This preposition is used to indicate origin or where something or someone is from. In this context, 'du' indicates that the plane has just arrived from Senegal.
For example: 'Je reviens du travail' (I am coming back from work).
Learn more about Prepositions in French