把下面的句子连成含有宾语从句的复合句，求帮忙！！

I asked the teacher when the holiday will begin.

8. He asked me when the train will arrive.
9. Do you know whether they had a picnic in the park last Saturday?
10. Can you tell me whether a foreigner will give a speech on computers next week?
11. I don’t know if Lily is coming to the museum.

12. The policeman wants to know if you were at home before nine last night.
13. Do you know whether there is going to be a test this week ?
14. Nobody knows whether it will rain tomorrow.
15. He wants to know whether they had a good journey home.
16. I don’t know whether he has come back from Guangzhou.
17. Could you tell me whether Mr Brown lives in Room 207 ?
18. Do you know what they fought about ?
19. He told us he has been to Xi’an twice.
20. Do you know where Peter lives now?

7 I asked the teacher that When the holiday would begin.
8 He asked me that When the train would arrive.
9 Do you know wheather they had a picnic in the park last Saturday