em hãy gải thích tại sao CaO lại có khả năng sát trùng,diệt nấm

Rewrite each of the following sentences in another way so that it means almost the same as the sentence printed before it.
4. Let's check everything once more to be sure.
 =>Shall
5. I promise to pay you back on Saturday.
=>I'll
6. Do you want me to close the door for you?
 =>Shall
7. I'm thirsty and you are, too.
=>Shall we
8. I want you to hel me with math problem.
=>Will
9. Don't make noise. The baby is sleeping
=>Will you 
10. Please help me with this homework.
=>Will you
11. We are willing to pick you up at the airport.
=>We will
12. Can you answer the phone?
=>Will
13. Do you want me to drive?
=>Shall
14. Can you pour a glass of water for me?
=>Will
15. Shall we go with each other?
=>Let's

VII. Rewrite each of the following sentences in another way
3. Manh plays the piano. He started when he was ten years old.
- Manh has
4. Bao doesn't ty fast as he used to.
 - Bao used
5. Shes verybeautiful, so she becomes a Miss Grand. (enough)
 - She is
6. Keeping the neighborhood clean and green is everyone's responsibility
 - It is responsible