1. 听下面一段材料，然后回答问题。

1. （1） How old was Gao Min when she became known as a world class diver?
3. （2） When did China get its first gold medal in swimming?
5. （3） What did Li Ning win at the 1984 Summer Olympics?
7. （4） What kind of company did Li Ning found in 1990?