Read and complete the sentences with suitable words/ phrases in the text.

LONDON TAXI

Robert is a taxi driver in London. He works six days a week. He can start and finishe his work at any time he wants, as long as he works enough hours during the day. As London is a very busy city, sometimes he works overtime on a Saturday, which is good as it means extra money. Driving a taxi is difficult and dangerous. Traffic in the city is often slow because of accidents and construction sites which drivers have to go around. When it rains or snows, the roads are very difficult to drive on. Robert sometimes never gets paid especially when he has to deal with drunk passengers. Most of Robert’s passengers are friendly and tip him generously. Robert likes his job, but lately he has been suffering with backache. He is wondering if he is old.

Robert is working as a ____________________.