Do you think we will ever send a person to THE Mars? When you go to THE London, don't forget to see the London eye. When we use THE cars, we damage the environment. I'm not telling A lies. It's the truth. I'm looking for a teacher who can teach me THE German. Ray needs a warm hat and a new coat for his visit to THE Russia. Dad has gone to A work and forgotten the car keys. Some people have AN unusual pets, such as lions or tigers.