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Irregular plurals - English lesson

A few nouns have an irregular plural.

Here are examples:

alumnus/alumni

cactus/cacti

crisis/crises

diagnosis/diagnoses

ellipsis/ellipses

hypothesis/hypotheses

oasis/oases

paralysis/paralyses

parenthesis/parentheses

synthesis/syntheses

Exercise:

Choose the correct plural form of the word that completes the sentence.

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1. There have been a lot of crisescrisiscrissI don't know in the world so far.

2. The farmer looks after all his goosegeesegoosesI don't know very carefully.

3. This cat always tries to catch mousemicemousesI don't know in the garden.

4. Look over there! There are some beautiful cows and oxenoxesoxsI don't know.

5. Those childrenchildrenschildsI don't know are very nice and they like to go to school.

6. Be careful, you have to change the word that is in parenthesasparenthesesparenthesisI don't know.

7. We can see a lot of strange phenomenonphenomenaphenomensI don't know in the world.

8. The dog is watching the sheepshipssheepsI don't know and making them go back to the farm.

9. William, come on! You have to brush your toothstoothteethI don't know.

10. This lady takes good care of her garden and she has a lot of beautiful cacticactuscactusesI don't know.