Put the verbs in the Present Simple form.

One fly_____________ (to fly) , two flies _____________ (to fly).
One girl _____________ (to cry), four girls _____________ (to cry).
When a wolf _____________ (to see) the moon, it _____________ (to begin) to howl (выть).
Wolves and sheep _____________ (to be) never friends.
Our hens _____________ (to lay [откладывать]) a lot of eggs.
Boys _____________ (to fight) and_____________ (to shout).
That boy _____________ (to try) to catch some balls.
These girls _____________ (to try) to run away from an angry turkey.
If one goose _____________ (to have) one tooth, how many teeth _____________ (to have) thirteen geese?