根据句意及单词的首写字母完成句子。

1. Yao Ming is a p_____basketball player .

2. Many rich people in America give their money to all kinds of  c_____.

3. We'll play a_____ Class 1 this Saturday afternoon.

4. Both the l_____ wanted to win the important case(诉讼案).

5. The r_____ why she did it is still a mystery(谜).