VI. 单词拼写
根据下列句子及所给汉语注释，在句子右边的横线上，写出空缺处各单词的正确形式。（每空只填一词）
1. He has taken drugs for so long a time that when he feels lonely he smoked _________. (上瘾)
2. As a result of pollution, many people die from kinds of ________.（癌）
3. To protect the weak, the government should punish _______.（犯罪）
