portfolio 2 grammar exercise--article

This is _an__ easy question.
Please speak __a_ little louder.
May I have your __n/a_ phone number?
I have never seen _a_ UFO.Answera
May I ask you __the_ question?Answera
David is _the__ best student in our class.
What is _the__ name of the next station?
He has __n/a_ my car today.
I went to __the_ sea during my summer vacation.
Is there _a__ public telephone near here?