Air-travel is the most modem form of (25) transport and it (26) in the 20th century. Millions of people use airplanes for a variety of reasons. It is also extremely expensive to set up air-travel facilities. Some travel for business, others go on holiday (27) air and others use cargo planes to move their products from country to country very (28) . Some courier companies now have their own fleet of planes ready to carry parcels and post more efficiently. There are different types of passenger services - some arc cheap and provide a ‘no-frills’ service which is good for short journeys. Other airlines provide passengers with a luxurious flying experience. Airports are getting busier and it is evident that (29) passengers and businesses than ever are using airplanes to get to their destinations.

In order to stay healthy, it is important to have a balanced diet. We should eat three main groups of food. These groups are protein, carbohydrate and fat.
Proteins are very important for building our body. They help us to build new cells as old ones die. Meat and milk products are major sources of protein. We can also get protein from fish, eggs and beans.
Carbohydrates and fat are important to enable us to store energy. Carbohydrates are found in sugar and in cereals. Fat can be found in vegetable oil, in butter and in nuts.
Our body also needs minerals, such as iron and calcium and vitamins. Fish, vegetables and milk contain most of the minerals we need. Vitamins are found in fresh vegetables and fruit.