Is it only when you fail _________ you will be aware of your mistakes?
When _____ about one of the biggest concerns today, many citizens mentioned the sharp rise in housing price.
It was a _______story, and we all got ________.
--- Hey, Mary, your backpack looks nice. When did you buy it. --- I ____ it for two weeks.
The snowstorm ________ our difficulties.
.Why do you insist on buying a car ______ you have such good public transportation here?