请将下列句子改成复合句

1. Please tell me when the train arrives?
2. Do you know what he does?
3. He asked the boys whether they wanted fried chicken.
4. I don't know whether the watch was made in Shanghai.
5. He said his son would pass the exam.

Pls tell me when does the train arrive?

do you know what does he do

1.Could you tell me when the train arrive ?
2.Do you know what he do ?
3.He asked the boys whether they wanted fried chicken.
4.I don't know whether the watch made in shanghai.
5.He said that his son would pass the exam.

Please tell me when the train arrives.

Do you know what he does.

Ke asked the boys if they want the chicken.

I don't know if the watch was made in Shanghai.

He said his son would pass the exam.