Plurals of nouns

What a beautiful scarf!
Have you got a clean handkerchiefs/handkerchieves?
They told us about their lives and the miseries they had suffered.
Their lives and their money were in danger.
They have five wolves in the zoo.
Which shelves are mine?
I have lost many umbrellas and scarves/scarfs, and two or three pairs of gloves.
She knits nice woollen scarves/scarfs.
Put this leaf under something heavy.
leaves fall from trees in autumn.
I have lived here all my life.
Have you ever seen a wolf?
Dust these shelves, please.
To perform this trick you will need two handkerchiefs/handkerchieves.
One shelf is empty.
Chris has many leaves in his collection.
Are there any wolves in this forest?