Read the following passage and mark the letter A, B, or D to choose the word or phrase that best fits each of the numbered blanks.

It is true that keeping fit will benefit a person’s health in many ways. It has become clear in recent years, that a large number of people are doing less and less exercise, and this is now causing (21) ________ serious illnesses, putting a strain on doctors and hospitals. However, some experts believe that too much exercise can do just as much damage. Although it is true that moderate exercise such as walking can be very beneficial to a person’s health, it is not the only one factor (22) ________ keeps us healthy. Diet is also extremely important, and I would argue that it is probably even more important than exercise, although the ideal is for both of these factors to work together. It seems to me that many people are unwilling to put in the effort required to become fitter.

    (23) ________, too much exercise can also cause problems. So, people are (24) ________ to take moderate exercise and eat moderately healthily rather than embarking on extreme diets and training. In too many instances, ultra–fit people have had heart attacks or dropped down dead. In all, governments need to find ways of motivating people to (25) ________ responsibility for their own health. People need to realize that eating healthy food does not have to cost a fortune, nor is it difficult to prepare healthy meals themselves. People need to be better educated about their health.

It has become clear in recent years, that a large number of people are doing less and less exercise, and this is now causing (21) ________ serious illnesses, putting a strain on doctors and hospitals.