No one is allowed, no matter who he is, _____ the room unless he has a permit.
There are _____ to show that a new, different city is coming out of its dark past.
As is reported, it is 100 years _____ Qinghua University was founded.
There is clear evidence _____ the most difficult feeling of all to interpret is bodily pain.
If you keep on your research, you'll _____ the result in time.
I called the airline to _____ my flight reservation a week ago.