Everyone is different and that is ________ makes our world much better.
It was so dark that he __________.
The Wangs are considering __________ to Huangshan for a trip at five tomorrow morning.
The rule is true __________ all cases.
Don't worry; the guide will tell you how to avoid __________ ill while travelling.
Money ________ happiness; you need a certain amount (数量) to live comfortably, but more money does not necessarily buy more happiness.