It is raining .
Although the police thought he was the most likely one, _____ they had no exact proof about it, they could not arrest him.
As we know, _____ medical examination will help us find out health problems as early as possible.
I found some old pictures at the back of my drawer which _____ memories of my childhood.
---Is everyone here? ---Not yet …Look, there _____ the rest of our guests.
---_____ the incident have happened last term? ---No. At the very beginning of this term much as I remember.