1 . In Stephen Hawking’s ________ (情况), it was discovered that he was a brilliant scientist. (根据汉语提示单词拼写)

2 . In some ________(情况) people have had to wait several weeks for an appointment. （根据汉语提示单词拼写）

3 . There were 16 __________ (案例) of damage to cars in the area recently. （根据汉语意思填空）

4 . 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）