Not until the fish died in the river how serious the pollution was.
It was ________ very rare find and the archaeologist who made ________ discovery said it was like unearthly a Mona Lisa.
What disappointed ________ Chinese most is that the national football team was kicked out of the Asian Cup ________ second time, with four points from three matches.
—Oh, ________ air is so bad. Shall I open the windows to let in ________ fresh air?—Ok, thank you.
In some places women are expected to earn money ________ men work at home and raise their children.
There were some chairs left over ________ everyone had sat down.