The author suggests that the recreative possibilities of green-space should be provided ______.

A．better use of green-space facilities should be made so as to improve the quality of life
B．attention must be directed to the improvement of recreative possibilities
C．the urban environment is providing more recreation activities than it did many years ago
D．priority must he given to the development of obligatory activities

A．want to show their existence by creating a culture of their own
B．have a strong desire to be leaders in style and taste
C．have no other way to enjoy themselves better than before
D．want to irritate their parents enormously