Horses have lived with people for centuries. They are ____________ (FRIEND) and clever animals and they do lots of jobs for people. In the past, horses were widely used in agriculture. Farming was ___________(POSSIBLE) without them. Nowadays crops are grown and transported with ________________ (DIFFER) machines but horses still play an important part in our life. Police officers have to patrol some areas on horseback. Horse riding has become a popular pastime in big cities where people’s life is ___________ (STRESS) and tense. In a riding club, a professional ___________ (TRAIN) can teach you how to ride a horse. The lessons are quite expensive, but riding clubs sometimes offer free lessons to people who help to take care of the horses. If you really enjoy __________ (COMMUNICATE) with these animals, there is always a way!