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.
1) I downloaded a useful app. Now I can add stickers to my photos.
Solution: The missing word is "app" because the sentence talks about downloading a useful app.
2) Is there ___ in this place? I want to connect to the Internet.
Solution: The missing word is "Internet" because the sentence talks about wanting to connect to the Internet.
3) Oh, no! My phone ___ is only 5%!
Solution: The missing word is "phone" because the sentence talks about the phone having only 5% battery.
4) This song is very popular. Many people have it as a ___ on their phone!
Solution: The missing word is "ringtone" because the sentence talks about the song being set as a ringtone on people's phones.
5) He uses his phone all the time so he always carries a ___ charger with him.
Solution: The missing word is "portable" because the sentence talks about carrying a portable charger.
6) The ___ of my phone is broken. Can you fix it for me?
Solution: The missing word is "screen" because the sentence talks about the screen of the phone being broken.
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