单选题
[阅读选择]Today， working less than a 40-hour week， people enjoy more leisure time. Hence， the wise use of leisure time has become an important problem for everyone， young or old. It is a particularly difficult problem for the sick， the aged， and those who have retired from earning a living. Those people have so much leisure that it is hard for them to find interesting and worthwhile ways to use it.
How to spend leisure time wisely is not a particularly difficult problem for people ______.
A.who are very busy everyday
B.who are sick in bed
C.who are aged and in good health
D.who have retired from work
正确答案：A
答案解析：本题可采用排除法，第三句话（It is a particularly difficult problem for the sick, the aged, and those who have retired from earning a living.），可以看出这三类人对于怎样度过空闲时光是特别困难的，所以可以排除BCD项，选A。