It was rather strange how the habits of his youth clung to him still. He was 72（）.

单项选择题Public relations practice is the deliberate, planned and sustained effort to establish and maintain mutual understanding between an organization and its public（）.

A．complete
B．related
C．intentional
D．active

单项选择题Scientific evidence from different disciplines demonstrates that in most humans the left hemisphere of the brain controls language（）.

A．groups of followers
B．years
C．countries
D．fields of study