题目

— Is Tom still smoking? — No. By next Saturday he ____ for a whole month without smoking a single cigarette. A. will go       B. will have gone      C. will have been      D. has been going 答案：B关于经线和纬线的正确叙述有①在地球仪上经线指示南北方向，纬线指示东西方向②每条经线的长度都相等，纬线长度由赤道向南北两极变短③在地球仪上，每条纬线形状都是半圆 ④经线和纬线的度数范围都是0°到90°A. ①② B. ②③ C. ③④ D. ①③