1. i don't want (advice, an advice, advices) or help. 2. there are too many (mouses, mice, mices) in the barn. 3. (children, childrens) usually inherit some characteristics from their father and some from their mother. 4. i bought three (grouses, grouse) for dinner. 5. we met many (japaneses, japanese) on our holiday. 6. the first class passengers filed before the captain as solemn as (oxes, oxen, ox). 7. there seemed to be varying (criteriums. criteria, criterias) for the treatment of passengers. 8. the (hangers-on, hanger's-on, hanger-ons) stared at us as though we were curious (phenomenons, phenomena, phenomenas). 9. the (deer, deers, deeres) were ravaging the man's fields. 10. he ordered two (gin-and-tonics, gins-and-tonic, gins-and-tonics). 1. her favourite flowers are (forgets-me-nots, forgets-me-not, forget-me-nots). 2. the girls are filling the watering tub for the cow and three (sheep, sheeps). 3. i cast four times and had four (trout, trouts. troutses). 4. she isn't one of those horrid regular (beautys, beauty, beauties). 5. there are many (gooses, geese, geeses) in the field. 6. you should clean your (tooths, teeth, teeths) every morning. 7. there were two (safes, saves) in the corner. 8. the house is nice but the (surroundings aren't, surrounding isn't) very pleasant. 9. the ships were bringing (cargoes, cargos) from all over the world. 10. there are three (salmons, salmon) in the aquarium.

1) advice
2) mice
3) children
4) grouse
5) Japanese’s
6) oxen
7) criteria
8) hangers-on
9) deer
10) gin-and-tonics

1) forget-me-nots
2) sheep
3) trouts
4) beauties
5) geese
6) teeth
7) safes
8) surroundings are
9) cargoes
10) salmon

1-1
2-3
3-2
4-2
5-2
6-1
7-2
8-3
9-2
10-2

1. In this sentence, the correct form would be "advice". The word "advice" is an uncountable noun, so it doesn't have a plural form. It can be used without an article or with the indefinite article "an" before it, but not with the plural form "advices".

2. The correct form would be "mice". "Mice" is the plural form of the noun "mouse". When referring to more than one mouse, we use "mice".

3. The correct form would be "children". "Children" is the plural form of the noun "child". There is no plural form "childrens".

4. The correct form would be "grouse". "Grouse" is both the singular and plural form of the noun, so there is no need to add an "s" at the end.

5. The correct form would be "Japanese". "Japanese" is the plural form of the noun "Japanese". We don't add an "s" at the end.

6. The correct form would be "oxen". "Oxen" is the plural form of the noun "ox". It is an irregular plural form.

7. The correct form would be "criteria". "Criteria" is the plural form of the noun "criterion".

8. The correct form would be "hangers-on". "Hangers-on" is a compound noun, and the plural form is the same as the singular form.

9. The correct form would be "deer". "Deer" is both the singular and plural form of the noun, so there is no need to add an "s" at the end.

10. The correct form would be "gin-and-tonics". "Gin-and-tonics" is a compound noun, and the plural form is the same as the singular form.

11. The correct form would be "forget-me-nots". "Forget-me-nots" is a compound noun, and the plural form is the same as the singular form.

12. The correct form would be "sheep". "Sheep" is both the singular and plural form of the noun, so there is no need to add an "s" at the end.

13. The correct form would be "trout". "Trout" is both the singular and plural form of the noun, so there is no need to add an "s" at the end.

14. The correct form would be "beauties". "Beauties" is the plural form of the noun "beauty".

15. The correct form would be "geese". "Geese" is the plural form of the noun "goose".

16. The correct form would be "teeth". "Teeth" is the plural form of the noun "tooth".

17. The correct form would be "safes". "Safes" is the plural form of the noun "safe".

18. The correct form would be "surroundings aren't". The word "surroundings" is a plural noun, so the verb "aren't" should match its plural form.

19. The correct form would be "cargoes". "Cargoes" is the plural form of the noun "cargo".

20. The correct form would be "salmon". "Salmon" is both the singular and plural form of the noun, so there is no need to add an "s" at the end.