◎ 题干
Using        illegal drugs can lead to health problems,and it can be        stain on
one’s life.                                  
[     ]
A./;the
B.the;the
C.the;a  
D./;a
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Usingillegal drugs can lead to health problems,and it can bestain on one’s life.[ ]A./;theB.the;theC.the;a D./;a …”主要考查了你对  【不定冠词】【零冠词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。