Ответ:
I. Nobody knows where he is.
2. This diagram shows us how it is done.
3. I am not sure when he is coming.
4. Mel isn't certain why he has done it.
5. We can't understand what he is saying.
6.1 haven't the slightest idea what his job is.
7. They don't know what the reason is .
8. Can anyone tell me where he lives?
9.I wonder what she does for a living.
10. Nobody knows what the date is.
II. I can't understand what the matter is.
12. Does anyone know what his address is?
13. I'm sorry, but I still don't know who you are.
Объяснение: