Where will Denis spend his holiday

A．how inhaled dust harms the lungs
B．the function of Environmental Protection Agency
C．the function of human alveolar macrophages
D．studies by Environmental Protection Agency

A．available employment should be restricted to a small percentage of the population
B．new jobs must be created in order to rectify high unemployment figures
C．available employment must be more widely distributed among the unemployed
D．the present high unemployment figures are a fact of life