My husband came home from work at four o'clock, his task ___ early today.
A:finishing
B:finished
C:was finished
D:had finished
下列正多边形的组合中,能够铺满地面的是( )
如图中Ⅰ、Ⅱ、Ⅲ分别代表某个概念或器官,下列能构成图中关系的是( )