Viết các câu sau thành câu bị động :
1. Open your book.
→ your book must be opened
2.Don’t do that silly thing again.
→ that silly thing mustn't be done again.
3.She advised me to sell that house.
→ i was advised to sell that house.
4.. It’s your duty to do this work.
→ You are supposed to do this work.
5.Someone will have you type the letter for me.
→ Someone will have the letter typed for me.