Mary , can you tell me how you keep in shape ?   You'll never be in shape until you eat less and take more exercise .   Now , tell me what you often eat .   I often eat fish and eggs .   Do you eat a lot of vegetables ?   Oh yes , and fruits . I love fruits very much .   What do you like to drink ?   Well , I never drink alcohol , coffee or tea .   Whatever would you like to drink ?   I drink a lot of milk . I drink milk almost every day .   How often do you exercise ?   Well , I walk every day .   It's a good diet and a regular exercise .   Yes , quite right . 