Ifto look after luggage for someone else, inform the police at once.
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.
---Are you fond of Liu Qian’s performance on the eve of the Spring Festival? --- No._______. .