Some people never know what they need ______ they lose it.A. until B. as C. after
--- How _____ hours do you sleep a day?--- Well, about eight hours. But how _____ sleep do we students really need?
--- Must I do the rest of the work today?--- No. You _________ finish it tomorrow.
--- Do you know Shenzhou X is flying in space?--- exciting news!
--- Which of the following words has the same sound as the “ed” in the word “danced”?--- Let me see. That’s .
--- Excuse me, is there ____ book by Mo Yan?---Yes, it’s on _____ bookshelf over there.