Choose the only correct plural form in each group.

Example:

1. a) tooth b) teeth c) teethes d) toothes

b

1. a) tooth b) teeth c) teethes d) toothes
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2. a) mapes b) beees c) prizes d) bookes
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3. a) stomaches b) epoches c) monarches d) benches
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4. a) armies b) daies c) dayes d) armys
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5. a) leafs b) roofs c) believes d) wifes
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6. a) zooes b) photoes c) sopranos d) potatos
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7. a) childrens b) sheeps c) childs d) oxen
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8. a) criterion b) criteria c) criterias d) criteriaes
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9. a) phenomenon b) crisis c) analysis d) theses
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10. a) man b) goose c) mice d) woman

1. My father was watching an interesting programme on TV, while I was reading for the examination.
2. We were playing the chess when the telephone rang.
3. My parents were having an unpleasant conversation when I came into their room.
4. Yesterday I was trying to beat the computer at chess all evening.
5. In the zoo the lions were being fed from 8.00 till 8.30 in the morning.
6. While we were having a swim in the lake, Mary was preparing a pleasant surprise for us.
7. When we were playing football, I suddenly broke my leg.

1) Where is Mary? She .. shopping. She'll be back soon.
c.has gone

2) Look! That man .. to open your car.
b. is trying

3) My brother is very sporty, he .. football a lot
a. plays

4) I .. to buy a new dress for the next party,
b. am going

5) My cousin .. with us for two weeks, he hasn't gone away yet.
c. has been staying 
6)
Hello! where .. you .. ?
b. are_going

7) I miss her. She .. at home for ages.
c. hasn't been

8) Hurry up! Everybody .. for you.
b. is waiting

9) I am very tired but I .. my work yet.
c. haven't finished

10) It .. hard since morning. I can't go for a walk.
c. has rained