All the people on the bus got excited when they arrived at the Great Wall.
A:got
B:reached
C:left for
如图,直线l1、l2被直线l3、l4所截,下列条件中,不能判断直线l1∥l2的是( )
某对夫妇先后生育了两个男孩,对此分析正确的是( )