Lily got up at 6:00 o’clock but she realized it was Sunday soon

_________the phenomenon of “bystander effect”in the Yueyue event, most Chinese strongly believe that there still exist love and warmth in people’s hearts

You’d better take something to read when you go to see the doctor ________ you have to wait[ ]

Progress so far has been very good,we are sure that the project will be completed on time[ ]

Those who have ________ floods and sandstorms know the importance of environmental protection.