—Children today find it hard to focus on study.
—Exactly,as they________so many fun things to do.
A:found
B:have found
C:had found
D:will find
我国历次人口普查文盲率统计图如图:
实行民主制的雅典国家被称作“男性公民的俱乐部”,这意味雅典国家的主人是( )