yang A tolong di jawabbb skarang smua yang jawab smua ku ksh yang terbaik

hanya dapat tiga, maaf ya

1. A book is bought by them every month
2. A book is being bought by them at this moment
3. A book has been bought by them 
4. A book was bought by them last week
5. A book was being bought by them
6. A book had been bought by them
7. A book will be bought by them 
8. A book is being bought by them