第一部分 单项选择（共35小题；每小题1分，满分35分）
请认真阅读下面各题，从题中所给的A、B、C、D四个选项中，选出最佳选项。
1. China, with 56.6million people living in Internet connected homes, is now ______ second only to the US, _______ leading online rating service reported Monday.
A．the; a B．/; a C. /; the D．the; a
