There are many ______ in this hospital.

A．More and more research workers believe the effect of cigarette smoking on health.
B．Filters and low tar tobacco can not get rid of the danger.
C．Cigarette smoking has a greater effect on health than cigar or pipe smoking.
D．All forms of tobacco smoking affects life expectancy and health.

A．male smokers smoke more than female ones
B．male smokers are more likely to be affected by smoking
C．male smokers breath in the smoke deeper than female ones
D．male smokers are more likely to be affected by other factors in envionment