Ответ:
1. He hoped that this question will be discussed before his coming.
2. What’s question is being discussed now?
3. This question had been already discussed.
4. Next question will be discussed tomorrow.
5. When I arrived this question was being discussed.
6. When I go away this question still wasn’t being discussed.
7. This question will be discussed by 5.
8. I was sure that this question will not discussed.