Jawaban:(ingat: struktur pasif = object + to be + past participle + by + subject).---1. I am drinking Ice tea in a hot weather.➡ Ice tea is being drunk by me in a hot weather.2. Mother is calling my aunt.➡ My aunt is being called by mother.3. My hamster is running in a wheel.⚠️ Kalimat ini intransitif (tidak ada objek), jadi tidak bisa diubah ke pasif.4. My sister is doing her homework.➡ Her homework is being done by my sister.5. My family and I are watching TV.➡ TV is being watched by my family and me.6. I eat brown rice and green beans.➡ Brown rice and green beans are eaten by me.7. (—) rides a fixed gear bike. (subjek tidak jelas)➡ A fixed gear bike is ridden (by …).8. She brings little money.➡ Little money is brought by her.9. My father reads a daily newspaper.➡ A daily newspaper is read by my father.10. The tower crane operators wear a hard hat.➡ A hard hat is worn by the tower crane operators.11. They have written three letters.➡ Three letters have been written by them.12. She has finished the homework.➡ The homework has been finished by her.13. He has eaten all the cookies.➡ All the cookies have been eaten by him.14. They have cleaned the classroom.➡ The classroom has been cleaned by them.15. The students have prepared the project.➡ The project has been prepared by the students.16. She washed the dishes yesterday.➡ The dishes were washed by her yesterday.17. They built a new bridge last year.➡ A new bridge was built by them last year.18. The teacher explained the lesson clearly.➡ The lesson was explained clearly by the teacher.19. The company produced many cars in 2010.➡ Many cars were produced by the company in 2010.20. He saw a movie last night.➡ A movie was seen by him last night.--- Jadi, hampir semua bisa dipasifkan kecuali nomor 3 (karena intransitif, tidak ada objek).