1.The nurse taught Hoa how to give first-aid on the phone.
⇒Hoa was taught how to give first-aid on thephone by the nurse.
2. He prefers English to Literature.
⇒ He is like English more than Literature.
3. Thinking of making toys from used paper was his interesting idea.
⇒His interesting that he thought of making toys from used paper.
4. Peter saved 10£ a month, so that he could go on holiday in the summer.
⇒Because Peter saved 10£ a month, he could go on holiday in the summer.
5. Has everyone left the room?
⇒Everyone has left the room, hasn't they?
6. “ You broke my window glass this morning, Tom” said Tom’s neighbor.
⇒Tom’s neighbor said that he had broken his/her window glass that morning.
7. Your book is 15,000 dong. My book is 30,000 dong.
⇒ Your book and my book are 15,000 and 30,000 dong.
8. What do you say in the situation you want your friend tidy the class room?
⇒ How did you said in the situationed you want your friend tidy the class room?
9. I couldn’t do the test because it was very hard.
⇒I could not do the test because it was very hard.
10. Lan told me not to play with matches because it was dangerous.
⇒Lan said me not to play with matches because it was dangerous.