问题描述：
用un/im/in/dis作为前缀,将下列词变为反义词
1.__advantage 2.__polite
3.__helpful 4.__honest
5.__luckly 6.__careful
7.__popular 8.__possible
1.__advantage 2.__polite
3.__helpful 4.__honest
5.__luckly 6.__careful
7.__popular 8.__possible
问题解答：
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