The United States of America is a union of fifty states and is the third largest country in the world

Exercise 1. Transform each of the following words into plurals:

1. 
   Day Tax Taxi Lady Mountain
   

Answers 1-5: Days Taxes Taxis Ladies Mountains
Exercise 2. Choose the correct plural for each of the words that follows:

1. 
   Choice
   a. Choices b. Choices c. Choiceies
   
2. 
   Box
   a.Boxs b. Boxies c. Boxes
   
3. 
   Thief
   a.Thiefies a. Thiefs c. Thieves
   
4. 
   Army
   a.Armys b. Armies c. Army
   
5. 
   Owl
   a.Owls b. Owlies c. Owelds
   

Answers: 1–a; 2.–c; 3–c; 4.–b; 5–a

Exercise 3. Choose the best word to fit into each of the following sentences:

1. 
   The men sharpened their _____________ before throwing them at the targets.
   A – knife B – knifes C – knives
   
2. 
   Please eat the rest of your _____________.
   A – pease B – Peas C – Peies
   
3. 
   I’d like you to stop leaving your ________________ on the floor.
   A – Socks B – Sockses C – Sox
   
4. 
   We saw a lot of _________________ at the park.
   A – Deers B – Deeries C – Deer
   
5. 
   This recipe calls for a lot of _____________.
   A – Tomatos B – Tomatoes C – Tomaties
   

Answers: 1.–C; 2. –B; 3.–A; 4.–C;5–B

Exercise 4. Give the plural forms.
month, horse, flower, potato, book, plan, bridge, match, nose, bus, box, army, carrot, watch, onion, shop, address, day, fly, hotel, lady, key, gate, clock, office, city.
Key. Months, horses, flowers, potatoes, books, plans, bridges, matches, noses, buses, boxes, armies, carrots, watches, onions, shops, addresses, days, flies, hotels, ladies, keys, gates, clocks, offices, cities.
Exercise 5. Find the correct variant.

1. 
   We can’t take moneys/money/monies from him.
   
2. 
   She went/go to her room to change her closes/clothe/clothes.
   
3. 
   Mans Zelmerlow says that we are the heros/heroes/hero of our time.
   
4. 
   Mary loves children/childrens/childs. She has three lovely baby/babies/babes.
   
5. 
   Nataly has got very long and beautiful haires/hair/hairs.
   
6. 
   Do you wear glasses/glassies/glass?
   
7. 
   A lot of peoples/people speak/speaks English
   
8. 
   I don’t like mouse/mouses/mice. Im afraid of them
   
9. 
   Sheeps/Sheep/Sheepes eat grass/grasses/grassies.
   
10. 
    Give me please a piece of cheese/pieses of cheeses/cheese.
    

Key 1. Money 2. Went, clothes 3. Heroes 4. Children, babies 5. Hair 6. Glasses 7. People, speak 8. Mice 9. Sheep, grass 10. a piece of cheese.