1 . Yet this is not always the c_________(情况，案例). (根据中英文提示单词拼写)

2 . He may win the competition in the final, in which ________（情况）he will probably get into the national team. （根据汉语提示单词拼写）

3 . Four and a half years ago, U.S. officials began an investigation into a cigarette-smuggling c_________ involving organized crime. （根据首字母填空）