单项选择题
A．They are not in style any more. B．They have cost him far too much. C．They no longer suit his eyesight. D．They should be cleaned regularly.
A．Different approaches to coping with stress. B．Various causes for serious health problems. C．The relationship between stress and illness. D．New finding of medical research on stress.
A．By harassing them. B．By appealing to the public. C．By taking legal action. D．By resorting to force.