题目

秦岭-淮河是我国东部季风区一条重要的地理界线，与它的位置大致吻合的有（      ） ①1月0℃等温线通过的地方     ②旱田与水田的分界线     ③亚热带和暖温带的分界线 ④冬季河流封冻与否的分界线    ⑤人口稠密与人口稀疏的分界线 A．①②③⑤          B.②③④⑤         C. ①②③④       D. ①②④⑤3.Hello, I ________ to telephone you all day. Where ________ ? A. tried; were you B. have been trying; were you C. have tried; are you D. are trying; are you