A:supposed
B:suppose
C:to suppose
D:supposing
—What's wrong with you, Eric? You look tired.
—I __________ to prepare for the final exam last night.
下列我国各地中,昼夜长短年变化幅度最大的是( )
地球表面的某一点位置可以用经纬网来确定,仔细阅读经纬网图,完成下题.
下列地区,人口分布最为稀少的是 ( )