Question

3. Complete a story on the basis of hints
given :
"A thirsty crow -----flying---
reached a village---saw a pitcher
water --- low --pebbles-- drank water
--20
a​

Answer 1

3.Complete a story on the basis of hints given:

"A thirsty crow was flying and reached a village

and saw a pitcher water was low so the crow find pebbles and fell them inside the pot of water and drank water.

Problem

I cannot understand the meaning of 20 here.