阅读理解。阅读下列短文, 从给的四个选项 (a、b、c和d) 中, 选出最佳选项。
in present-day china，we can find two types of fast food—western food and chinese food.however，not until the recent decade has western fast food become popular in china.before the first hamburger walked its way into the chinese food market，we had little idea about such terms as hot dogs，pizza，potato chips，let
