单选题
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
【正确答案】
B
【答案解析】
倒数第二段中给出证据：Almost all these deaths can attributed directly to tobacco smoking。
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