日语
韩语
法语
德语
西班牙语
意大利语
阿拉伯语
葡萄牙语
越南语
俄语
芬兰语
泰语
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21. I still see pinyin as ____ bridge between China and the rest of the world, ____ bridge between cultures.
A. a; the B. a; a C. the; a D. the; the
21. I still see pinyin as ____ bridge between China and the rest of the world, ____ bridge between cultures.
A. a; the B. a; a C. the; a D. the; the
