If there___no sunlight in the world,we___in darknessA should be;would have livedB could be;would liveC could be;would have livedD should be;would live

If there___no sunlight in the world,we___in darknessA should be;would have livedB could be;would liveC could be;would have livedD should be;would live
If there___no sunlight in the world,we___in darkness
A should be;would have lived
B could be;would live
C could be;would have lived
D should be;would live

If there___no sunlight in the world,we___in darknessA should be;would have livedB could be;would liveC could be;would have livedD should be;would live
d

if将来时虚拟语气，
从句should，主句 would/should/could do.

选D
这是虚拟语气。if句用should + 动词原形，主句用would + 动词原形，表示与将来相反的假设。