太阳活动的主要标志是
pigs cows cats ducks rabbits sheep
My uncle has a farm. It's big. On the farm, you can see two ____ . There are twenty ____ and eighteen ____ on the farm. You can see eleven ____ , thirteen____ and fifteen____ .
. There are twenty 
and eighteen 
on the farm. You can see eleven 
, thirteen
and fifteen
.