their
Robin and Paul will drive what car to the airport and leave it for you to pick up.The pronoun that will replace the word 'what' is a possessive adjective, a word placed before a noun (car) to describe that noun as belonging to the antecedent(s).The difficulty in choosing the correct pronoun is that we don't know if the car is jointly owned by Robin and Paul. In that case, the correct possessive adjective is:Robin and Paul will drive their car to the airport and leave it for you to pick up.We don't know if it's owned by Robin or Paul. If Robin and Paul are both males, the singular, possessive adjective will create a 'vague pronoun-antecedent reference'.Robin and Paul will drive his car to the airport and leave it for you to pick up.To correct the vague pronoun-antecedent reference, the sentence will need rewording using a possessive noun: Robin and Paul will drive Robin's car to the airport and leave it for you to pick up. (or 'will drive in Paul's car)The last option is that Robin is a female and Paul is a male. This will make the pronoun choice a little simpler:Robin and Paul will drive her car to the airport and leave it for you to pick up.Robin and Paul will drive his car to the airport and leave it for you to pick up.
The pronoun their is a possessive adjective, describing the car as belonging to Robin and Paul.
Paul Robins was born in 1804.
Paul Robins died in 1890.
The airport code for St. Paul Downtown Airport is STP.
The airport code for St. Paul Island Airport is SNP.
Robin Paul Weijers goes by Mr. Domino.
Minneapolis St Paul International Airport (MSP).
Robin Paul Weijers was born on May 4, 1965, in Netherlands.
Paul Robin has written: 'Le dernier jeu de l'oie'
Robin Paul
The airport code for St. Paul Aerodrome is ZSP.