Cloze Test (CT-2) Birds like humans use language in their .....(A).... to communicate. But they have the ......(B)........ to communicate in a large number of ways. These different ......(C)......... of communication among birds .....(D)........ from beating their wings to puffing their feathers. However, one of the ways which seems to be very ......(E)...... is singing. So, normally they use complex long sounds to find a mate and .....(F).......... their needs. Accoring to the CT-2 choose appropriate word to complete the ......(A)...... blank. 
1 powers
2 interests
3 societies
4 regions