Phần chuyển câu Passive và Causative passive

Phần chuyển câu Passive & Causative passive
1. These students have disappointed their teacher
- These students
2. He has to sweep the stairs everyday
- The stairs
3. My parents used to take me to the park every Sunday
- I used
4. A plumber is going to mend the broken pipe
- We are having
5. The performance attracted us a lot
- We