单项选择题

The cure for lung cancer ______.

A．can be found before long
B．is available if one needs it
C．is unknown at present
D．will be found before you need it
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单项选择题
According to the passage, lung cancer ______.
A．is the major cause of death between the ages of 35 and 55
B．is most often caused by smoking
C．never affects non—smokers
D．has nothing to do with smoking
单项选择题
The passage suggests that women ______.
A．smoke as much as men
B．react better than men to smoking
C．are affected by smoking only during pregnancy
D．run the risks as men if they smoke
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