_______ is our belief that improvements in health care will lead to a stronger, more prosperous economy.
Her father _______ in the USA for another year, so that she could work toward her master’s degree.
They ____two free tickets to Canada, otherwise they’d never have been able to afford to go.
We must set aside some money for a rainy day __________ run out of our income immediately.
.____fashions differ from country to country may reflect the culture difference from one aspect.
So far, scientists haven’t found any evidence of water that ______ life on Mars.