Change the sentences into passive voice?

IV. Change the sentences into passive voice.

1. You must finish your homework before 9 o'clock

-> Your homework must be finished by you before 9 o'clock

2. No one helped her sovle that problem

-> She wasn't helped solve that problem

3. We can't find out the solutionto that problem

-> The solution to that problem can't be found out

4. Someone has asked me to give a talk about my country

-> I have been asked to give a talk about my country

5. Jack taught me to play ping-pong

-> I was taught to play ping-pong

6. They made this ring of gold and diamond

-> This ring of gold and diamond was made by them

7. They had visted me before they lelf for Hanoi

-> I had been visited by them before they lelf for Hanoi

8. She has been waiting for Nam for over an hour

-> Nam has been being waited for over an hour by her

9. Her mother requested her not to come home late in the evening

-> She was requested not to come home late in the evening by her mother

10. We need to clean our bike once a day

-> Our bike needs to be cleaned once a day

hoặc

-> Our bike needs cleaning once a day

V. Complete the sentences, using the words given

1. I/not/use/lots/ sports/ when/be/small

-> I didn't use to play lots of sports when I was small

2. Tonight's concert/begin/8.00/not end/until/11.00

-> Tonight's concert will begin at 8.00 and will not end until 11.00

3. My listening result/poor/teacher/asked/spend/time/it

-> My listening result was poor , so the teacher asked me to spend time on it

4. Revision/necessary/us/learning/ foreign language

-> Revision is not necessary for us when learning foreign language

5. Three aims/scouting program/building characcter/fitness

-> Three aims of scouting program is building charater and fitness