Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 26 to 30.

OLD AND ACTIVE
It is a well-known fact that Japanese people have a longer life expectancy than the population of most other countries. They also expect to (26) _____ healthier for longer.
Scientists are trying to work out what keeps elderly Japanese people so healthy, and whether there is a lesson to be learnt from their lifestyles. Should we make any changes to our eating habits, for instance? Are there (27) _____ secret ingredients in the Japanese diet that are particularly (28) _____ for the human body?
(29) _____ the prospect of a longer, healthier life is a good thing for the individual, it can actually create a social problem. The number of people over the age of 65 in the population has doubled in the last 50 years. Japan could soon be facing an economic problem: there are more elderly people (30) _____ need to be looked after, and relatively fewer younger people working and paying taxes to support them.