这是CNN新闻上的关于北京大兴机场的文章，其中有这么一段：All of this coinciding with the seventieth anniversary of the founding of communist China.In fact, to inaugurate this new airport, Presi...
1. The airport was built years ago, but for some reason it could not be used then. Last year, however, it came into use.(来自新2-21课) 2. Letters will cost a little more, but they will certainly trav...