Jawaban:
1. Are
2. Am
3. Is
4. Is
5. Are
6. Is
7. Are
8. Are
9. Are
10. Is
11. Are
12. Is
13. Is
14. Are
15. Are
Penjelasan:
Auxiliary Verb To Be
I menggunakan am; you, we, they menggunakan are; he, she, it menggunakan is.
Untuk nomor 3, subject-nya yaitu everything namun subject tersebut bersifat tunggal sehingga menggunakan to be is. Kata subject yang bersifat sama yaitu everyone, someone, anyone, nobody, etc.