Answer:
1.What you need is more practice.
2.When they will come hasn't been made public.
3.Could you tell me where you are from?
4.We should find out whether the museum is open.
5.The question is which route we should choose.
6.The reason why he is going /has gone to Beijing is very clear.
7.It is likely that their group will get ahead of us.
8.It doesn't matter what courses you take; just find the great professors.