______ reduce pollution,the government has made a policy to restrict the use of plastic bags in some areas.
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?