高中英语语法!（比较有难度）
1.be available for/to 的区别?
2.Shanghai as (a/the) population of over 16 million.(choose one and say why)
3.The official mascots of the 2004 Olympic Games were Athena and Phevos,___________________(A that of both B of which both)为什么选B?（解释请详细）