By the time you have finished this book, your meal ______ cold.

If nothing______, the oceans will turn into fish deserts. 

—Though it         in the desert most of the year, people still live there.—That’s the case. They say east or west home is the best.

Since the recent river pollution in Shanxi Province , people ____ more and more attention to the water quality.

Mary ___ a dress when she cut her finger.