It’s said that non-smokers who are always around smokers have almost the same of suffering from lung cancer.
A. potential
B. occasion
C. hope
D. opportunity
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(答案→)A. potential
B. occasion
C. hope
D. opportunity
解析：名词辨析。Ａ可能性;潜力,潜能；Ｂ场合,时刻；Ｃ行为；D机会。句意：据说总是围绕在烟民身边的不抽烟的能有同样的患上肺癌的可能性。