______ such heavy pollution already, it may now be too late to clean up the river.
Though having lived abroad for years, many Chinese still_______the traditional customs.
I’m afraid by the time you arrive this afternoon I_______ a lesson then.
In the good care of the nurses, the patient is ____recovering from the heart operation
A modern teaching building has been set up in ______ was a wasteland ten years ago.
The result might not as satisfactory as expected but the ________ on his face told us that he was very happy.